500 internal server error error jib, rf

500 internal server error error jib, rf

Вот такая ошибка сегодня утром, появилась я ничего не менял, remote server returned an error: (500) Internal Server Error. at Duplicati. In this case, the cause is that the end user's Windows username and password are not trusted by the website. Resolving The Problem. Either. У меня на сервере ISP и Roundcube. Внезапно ошибка 500. В логе нашлось: [Mon Jul 07 16:29:32 2014] [error] [client 178.124.111.67] SoftException in. 500 internal server error error jib, rf

500 internal server error error jib, rf - good

HTTP Error 500.19 - internal server error when you open an IIS Webpage

  • Article
  • 6 minutes to read

This article resolves a problem in which you receive an "HTTP 500.19" error message on a web application in Internet Information Services (IIS) 7.0 and later versions.

Original product version:   Internet Information Services 7.0 and later versions
Original KB number:   942055

To resolve this error, check the following sections for the appropriate error code information.

HRESULT code 0x8007000d

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x8007000d
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem occurs because the ApplicationHost.config or Web.config file contains a malformed or unidentified XML element. IIS can't identify the XML elements of the modules that are not installed. For example, IIS URL Rewrite module.

Resolution

Use one of the following methods:

  • Delete the malformed XML element from the ApplicationHost.config or Web.config file.
  • Check the unidentified XML elements, and then install the relevant IIS modules.

HRESULT code 0x80070021

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x80070021
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem can occur if the specified portion of the IIS configuration file is locked at a higher configuration level.

Resolution

Unlock the specified section, or don't use it at the higher level. For more information about configuration locking, see How to Use Locking in IIS 7.0 Configuration.

HRESULT code 0x80070005

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x80070005
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem occurs for one of the following reasons:

  • You're using IIS on a computer that is running Windows. Additionally, you configure the website to use Universal Naming Convention (UNC) pass-through authentication to access a remote UNC share.
  • The IIS_IUSRS group doesn't have the appropriate permissions for the ApplicationHost.config file, the Web.config file, or the virtual or application directories of IIS.

Resolution

Use one of the following methods:

  • Don't configure the website to use UNC pass-through authentication to access the remote UNC share. Instead, specify a user account that has the appropriate permissions to access the remote UNC share.

  • Grant the Read permission to the IIS_IUSRS group for the ApplicationHost.config or Web.config file. To do it, follow these steps:

    1. In Windows Explorer, locate the folder that contains the ApplicationHost.config file that is associated with the website, or locate the virtual directories or the application directories that contain the Web.config file that is associated with the website.

      Note

      The Web.config file may not be in the virtual directories or the application directories in IIS. Even in this situation, you have to follow these steps.

    2. Right-click the folder that contains the ApplicationHost.config file, or right-click the virtual or application directories that may contain the Web.config file.

    3. Select Properties.

    4. Select the Security tab, and then Select Edit.

    5. Select Add.

    6. In the Enter the object names to select box, type <computername>\IIS_IUSRS, select Check Names, and then select OK.

      Note

      <Computername> is a placeholder for the computer name.

    7. Select the Read check box, and then select OK.

    8. In the Properties dialog box for the folder, select OK.

      Note

      Make sure that the folder properties are inherited by the ApplicationHost.config and Web.config files so that IIS_IUSRS has the Read permission for those files.

HRESULT code 0x800700b7

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x800700b7
Description of HResult
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem may occur if there's a duplicate entry for the specified configuration section setting at a higher level in the configuration hierarchy (for example, ApplicationHost.config or Web.config file in a parent site or folder). The error message itself points out the location of the duplicate entries.

Resolution

Examine the specified configuration file, and compare it with its parent ApplicationHost.config or Web.config file to check for duplicate entries, as suggested by the error message. Either remove the duplicate entry, or make the entry unique. For example, this problem may occur because the ApplicationHost.config file has a duplicate entry for the following code:

To resolve this problem, delete the duplicate entry in the ApplicationHost.config file for the authorization rule. To do it, follow these steps:

  1. Select Start, type Notepad in the Start Search box, right-click Notepad, and then select Run as administrator.

    Note

    If you're prompted for an administrator password or for a confirmation, type the password, or select Continue.

  2. On the File menu, select Open, type %windir%\System32\inetsrv\config\applicationHost.config in the File name box, and then select Open.

  3. In the ApplicationHost.config file, delete the duplicate entry that resembles the following code:

HRESULT code 0x8007007e

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x8007007e
Description of HResult
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem occurs because the ApplicationHost.config or Web.config file references a module or a DLL that is invalid or doesn't exist.

Resolution

In the ApplicationHost.config or Web.config file, locate the module reference or the DLL reference that is invalid, and then fix the reference. To determine which module reference is incorrect, enable Failed Request Tracing, and then reproduce the problem.

HRESULT code 0x800700c1

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x800700c1
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem can occur if the bitness of the specified module is different than that of the application pool hosting the application. For example, you're trying to load a 32-bit component into a 64-bit application pool. This problem may also occur if the specified module is corrupted.

Resolution

Make sure that the specified module's bitness is the same as that of the hosting application pool. Also, make sure that the module is not corrupted.

HRESULT code 0x8007010b

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x8007010b
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem can occur if the specified content directory cannot be accessed.

Resolution

  • Verify that the file path exists.
  • Verify that the file path is correctly named.
  • Verify that the file path has the correct file-level permissions set.
  • Verify that the file path is pointing to a valid file system type.

If you aren't sure what the file path is, use the Process Monitor or Failed Request Tracing tool to identify it.

HRESULT code 0x8007052e

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x8007052e
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

The default process identity in IIS doesn't have sufficient permissions to open the Web.config file on a remote share.

Resolution

Verify that the application pool identity account of this web application has sufficient permissions to open the Web.config file.

HRESULT code 0x80070003

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x80070003
Description of HRESULT
Cannot read configuration file.

Cause

This error is caused by a lack of permission or by a physical path that doesn't match the path for the virtual directory. For example, no Web.config exists under the web app physical root path.

Resolution

  • Verify that the Web.config path exists and has correct permissions set.
  • Collect Process Monitor logs to get more information about the error.

Fix break IIS configuration file issue when you update windows

As a general safety rule, all configuration files (not limited to IIS) should be backup before installing any update. If you use Virtual Machines, take a snapshot of the Virtual Machine before you update it. This advice isn’t limited to Windows updates.

As marketers, we love high numbers. 500 post views? 500 new leads today? Fantastic!

woman using a laptop computer to resolve the

But, sometimes high numbers aren’t so great. The last thing any website owner wants to see when opening their homepage is this:

an example. ofan error screen displaying the HTTP Error 500 message in wordpress, is currently unable to handle this request

Image Source

When you get a 500 Internal Server Error on your WordPress website, it brings your entire operation to a standstill and leaves you rushing to find a solution.

The good news is that this is a common problem in WordPress. And, with a bit of investigation, there’s usually an easy solution. In this article, I’ll show you why your site "is currently unable to handle this request" and how to get rid of this message.

Download Now: How to Launch a WordPress Website  [Free Guide + Checklist]

HTTP Error 500 in WordPress: What Does "is currently unable to handle this request" Mean?

When you visit a website, your browser makes a request to a web host, asking to send you a web page. If something is wrong with your website that prevents the hosting server from delivering that page to your browser (i.e. it is unable to handle the request), it will instead send you an error message. This is a 500 Internal Server Error.

An HTTP 500 error can be caused by many different things, but it’s probably not an issue with the host server itself. It's more likely that the host can’t retrieve the contents of your WordPress site for some reason.

With the WordPress CMS, the most common causes of a 500 Internal Server Error are:

  • faulty plugins or themes
  • a broken .htaccess file, and/or
  • the PHP memory limit being exceeded.

Occasionally, the issue might also come from your hosting server.

The vagueness of a 500 makes it pesky to deal with — the good news is that trying a few repairs will almost certainly solve your problem. Here's what to do:

How to Fix the 500 Internal Server Error in WordPress

  1. Back up your website.
  2. Enable the WordPress debugging feature.
  3. Deactivate your plugins.
  4. Disable your currently active theme.
  5. Check your .htaccess file.
  6. Check your PHP memory limit.
  7. Replace your WordPress core files.

1. Back up your website.

Fixing your issue will require changing some things on your site, including some alterations to with your plugins, themes, and possibly your WordPress core files. Even though your site is down, make a backup of your files in case you lose data and need to backtrack.

Save your backup in a safe location. Hopefully you won’t need it, but it's good to have just in case.

2. Enable the WordPress debugging feature.

WordPress includes a handy debugger to help you troubleshoot issues like this. When something goes wrong, the error log will report the specifics of the problem.

The debugger disabled by default — first enable it with the steps below:

1. Access your website via FTP.

2. Open your public_html folder, or whichever directory contains your WordPress files.

3. Locate and right-click the wp-config.php file, then choose View/Edit.

4. With the file open, scroll to the bottom of the file and paste the following line of code:

This code tells WordPress to log errors on your website.

5. Save your changes and reload your website. On the error screen, you might see a more detailed report that identifies the source of the issue — this could point to a specific plugin or file. If the source of the problem is still unclear, read on.

Once you’re finished using the debugger, remember to disable it by removing the code you added above and saving the file, being careful not to change anything else!

3. Deactivate your plugins.

A likely cause of this error is that one of your plugins (or a combination of plugins) is causing your backend to malfunction. The best way to test this is by deactivating all your plugins, then narrowing down to the culprit(s).

If you can access the administrator account, try the following:

1. From the dashboard, select Plugins > Installed Plugins.

2. Check the box next to Plugin to select all your plugins.

3. Choose Deactivate from the Bulk Actions drop-down menu, then click Apply.

4. Refresh your site. If you no longer see the error, start activating each plugin one by one and reloading your website after each activation to identify the faulty plugin.

If you don’t have access to the administrator controls, you will need to connect to your server using the file transfer protocol (FTP). After connecting, you’ll see all your files for your WordPress website. Follow these steps:

1. Open the public_html folder (or wherever your WordPress files are stored on your server), then open the wp-content folder.

2. Rename your plugins folder “plugins_old”.

3. Refresh your website. If your site works, rename your plugins_old folder back to “plugins”.

4. Within the plugins folder, rename each plugin folder one at a time until you find the plugin that causes the bug.

If you find a specific plugin causing the error, replace the plugin or notify the plugin developer.

4. Disable your currently active theme.

If plugins aren’t the issue, your WordPress theme might be, especially if it comes from a third-party developer. To check this, start by temporarily replacing your current theme with a default WordPress theme. If you can access the administrator controls, follow these steps:

1. Select Appearance > Themes from the WordPress dashboard.

2. Activate any default WordPress theme, such as Twenty Nineteen.

activate theme screen to resolve the ""is currently unable to handle this request". HTTP 500 error" in WordPress

 

3. Check your website for the HTTP 500 error message.

If you can’t get into the admin account, you’ll need to use an FTP client to access the website. Then, do the following:

1. Open the public_html folder (or wherever your WordPress files are stored), then open the wp-content folder.

2. Open the themes folder and look for your active theme folder.

3. Add “_old” to the end of the name of your active theme folder. This disables the theme.

4. Refresh your website. If it works, you’ve found the problem. Contact the theme developer about the error and ask for the latest version of the theme.

5. Check your .htaccess file.

The next likely cause of a 500 Internal Server Error in WordPress is a corrupted .htaccess file, located in the root directory of your website files (usually public_html). This file contains various directions for your host server to follow, like allowing password-protection for web pages and redirecting URLs.

Like other source files, any typo or incorrect modification in .htaccess will break the code and potentially your site. Follow these steps to make sure it’s working:

1. Connect to your server with FTP or your cPanel dashboard.

2. Open your public_html folder (or whichever folder is your site’s root directory).

3. Find the .htaccess file. Your server might hide this file by default, in which case change the view settings to reveal it. Rename the .htaccess file to something like .htaccess_test.

4. Refresh your website. If you no longer see the HTTP 500 error, this means .htaccess is the source of the error. If you still see a 500, .htaccess is not the issue and you can skip to the next step, checking your PHP memory limit.

5. To repair .htaccess, you just need to replace it with a new one. From your WordPress dashboard, select Settings > Permalinks.

6. Click the Save Changes button at the bottom of the page. This replaces the old .htaccess file.

6. Check your PHP memory limit.

Your site’s PHP memory limit is allotted by your WordPress installation and by your host. If your site exceeds its memory capacity, this throws a 500 Internal Server Error. To increase your memory limit, try these steps:

1. Access your server files with FTP or cPanel.

2. Navigate to your site’s root directory and find the file wp-config.php. This file contains the rule that determines your memory limit. Make a copy of this file as a backup.

3. Open wp-config.php and search for the code “WP_MEMORY_LIMIT.” If you find it in the file, replace the value in this rule with '64M'. If not, paste this line of code at the bottom of the file:

4. Refresh your website. If the error is gone, you’ve found the issue.

This is just a temporary fix — if you’ve exceeded your memory limit, you need to determine why. It’s possible your site has grown too large, in which case you should upgrade your hosting plan to accommodate your storage needs.

However, another potential cause is a plugin or theme that is depleting your memory. To check this, contact your hosting provider and request a report of resource usage, or find this information yourself if your host has it accessible to you.

7. Replace your WordPress core files.

In some instances, your WordPress core files may have been improperly modified by a plugin or theme. If you’ve gotten this far with no fix, it might be worth it to swap out your current core files with clean, unmodified ones. While you’ll still have your site data after this change, you might need to re-toggle some original settings.

To replace WordPress core:

1. Download WordPress and unzip it on your device.

2. In the main wordpress folder, delete wp-config-sample.php and the wp-content folder. If you don’t delete these files, they’ll overwrite your current site data.

3. Use your FTP client to place the new WordPress core files on your hosting server and replace the current files.

If your more of a visual learner, here's a video that outlines all of these steps.

If All Else Fails...

As a last resort, reach out to your hosting provider support — the problem may actually be on your server in this case. Explain the troubleshooting you’ve conducted, and they’ll review your server configuration and logs to track down the cause. It’s in situations like this where quality customer service from your hosting provider really shines through.

Internal server errors are so frustrating because they’re ambiguous and sometimes even misleading. Still, by following the steps above, you’ll hopefully come out of it with minimal impact to your WordPress website and your reputation.

One more note: Be cautious about these types of errors when changing your website. We highly recommend testing out your new themes, plugins, and updates in a staging site. This way, if you get a 500, your visitors won’t see it on your live site and you won't be scrambling for a fix.

wp

Errors may occur when working with the application through the command line. When errors occur, Kaspersky Endpoint Security shows an error message, for example, . Kaspersky Endpoint Security can also show additional information in the form of a code, for example, (see the table below).

Error code

Description

License key for Kaspersky Endpoint Security is already in use on this computer.

License expired. Database update is not available.

Key not found.

Digital signature missing or corrupted.

Data corrupted.

Key file corrupted.

License expired or license key expired.

Key file not specified.

Cannot apply key file.

Failed to save data.

Failed to read data.

I/O error.

Databases not found.

Licensing library not loaded.

Databases corrupted or updated manually.

Databases are corrupted.

Cannot use invalid key file to add an additional key.

System error.

Black list of keys corrupted.

Digital signature of file does not match the digital signature of Kaspersky.

Cannot use a key for non-commercial license as a key for commercial license.

The beta license is required to use the beta version of the application.

Key file not compatible with this application.

Key blocked by Kaspersky.

Application has already been used under a trial license. Cannot add trial key again.

Key file corrupted.

Digital signature missing, corrupted, or does not match the digital signature of Kaspersky.

Cannot add a key if the corresponding non-commercial license has expired.

The date the key file was created or used is invalid. Check the system date.

Cannot add a key for trial license: another key for trial license is already active.

Black list of keys corrupted or missing.

Update description missing or corrupted.

Error in license key service data.

Cannot use invalid key file to add an additional key.

Error sending request to activation server. Possible reasons: Internet connection error or temporary problems on the activation server. Try to activate the application with the activation code later. If this error persists, contact your Internet provider.

Error in response from activation server.

Cannot obtain response status.

Error occurred when saving temporary file.

Activation code has been entered incorrectly or system date is incorrect. Check the system date on the computer.

Key file not compatible with this application, or license expired. You cannot activate Kaspersky Endpoint Security by using a key file for a different application.

Failed to receive key file. Incorrect activation code was entered.

Activation server has returned error 400.

Activation server has returned error 401.

Activation server has returned error 403.

Activation server has returned error 404.

Activation server has returned error 405.

Activation server has returned error 406.

Authentication on proxy server required. Check the network settings.

Request timeout expired.

Activation server has returned error 409.

Activation server has returned error 410.

Activation server has returned error 411.

Activation server has returned error 412.

Activation server has returned error 413.

Activation server has returned error 414.

Activation server has returned error 415.

Internal server error.

Functionality not supported.

Invalid response from gateway. Check the network settings.

Service unavailable (HTTP Error 503).

Gateway response timeout has expired. Check the network settings.

The protocol is not supported by the server.

Unknown HTTP error.

Invalid resource ID.

Invalid URL.

Invalid destination folder.

Memory allocation error.

Error converting parameters to ANSI string (URL, folder, agent).

Error creating worker thread.

Worker thread already running.

Worker thread not running.

Key file not found on activation server.

Key is blocked.

Internal error of activation server.

Not enough data in activation request.

License key expired.

Incorrect system date is set on the computer.

Trial license has expired.

License expired.

The limit of application activations has been exceeded for the specified code.

Activation procedure ended with a system error.

Cannot use a key for non-commercial license as a key for commercial license.

Activation code is required.

Cannot connect to activation server.

Activation server is unavailable. Please check your Internet connection settings and retry activation.

Application database release date exceeds the license expiration date.

Cannot replace the active key with an expired key.

Cannot add an additional key if it expires before the current license.

Updated subscription key missing.

Incorrect activation code (checksum does not match).

Key already active.

License types that correspond to active and additional keys do not match.

Component not supported by license.

Unable to add subscription key as an additional key.

Transport layer general error.

Failed to connect to activation server.

Invalid URL format.

Failed to convert proxy server address.

Failed to convert server address. Check the Internet connection settings.

Failed to connect to activation server or proxy server.

Remote access denied.

Response timeout has expired.

Error sending HTTP request.

SSL connection error.

Operation interrupted by callback.

Too many forward attempts.

Recipient check failed.

Empty response from activation server.

Error sending data.

Error receiving data.

Local SSL certificate error.

SSL encryption error.

Server SSL certificate error.

Invalid contents of network packet.

User access denied.

Invalid SSL certificate file.

Failed to establish SSL connection.

Failed to send or receive network packet. Please try again later.

Invalid file with revoked certificates.

SSL certificate request error.

Unknown server error.

Internal server error.

No license key available for the activation code entered.

Active key blocked.

Required parameters of application activation request are missing.

Incorrect user name or password.

Incorrect activation code sent to server.

Activation code is invalid for Kaspersky Endpoint Security. Unknown intended application for the activation code.

Request is missing an activation code.

License expired (according to data from the activation server).

Number of activations with this code has been exceeded.

Invalid format of request ID.

Activation code is invalid for Kaspersky Endpoint Security. Activation code is intended for a different Kaspersky application.

Cannot update license key.

Activation code is invalid for this region.

Activation code is invalid for the Kaspersky Endpoint Security language version.

Additional access to the activation server is required.

Activation server has returned error 643.

Activation server has returned error 644.

Activation server has returned error 645.

Activation server has returned error 646.

Activation code format not supported by activation server.

Invalid activation code format.

Incorrect system time is set on the computer.

Activation code is invalid for the Kaspersky Endpoint Security version.

Subscription expired.

Number of activations exceeded for this license key.

Invalid digital signature of license key.

Additional data is needed.

User data verification failed.

Subscription inactive.

Activation server is under maintenance.

Unknown error of Kaspersky Endpoint Security.

Invalid parameter transferred (for example, an empty list of activation server addresses).

Incorrect activation code.

Invalid user name.

Invalid user password.

Invalid response from activation server.

Activation request interrupted.

Activation server returned an empty forwarding list.

How to Fix Cloudflare’s “Error 520: Web Server Is Returning an Unknown Error”

When your site’s visitors see error 520 in their browser, it means Cloudflare is sending the message because your server returned an empty, unknown, or unexpected response.

The 520 error can be approached through troubleshooting first to find the cause and then fixed following these steps.

Let’s jump right in:

Troubleshooting Error 520

Since the 520 error is coming up because of an issue on your server, you can troubleshoot the issue by looking in your error log.

Error 520

Disable Cloudflare

Before you start troubleshooting, it’s necessary to disable Cloudflare. This helps isolate the problem by ensuring the issue can be replicated without Cloudflare being a factor.

Step 1

Start by logging into Cloudflare. Then, find your site on the list and click on it.

The Cloudflare dashboard

Step 2

Next, click on the DNS tab, then on the orange cloud under the Proxy status section in the table. You’ll know Cloudflare was disabled because the cloud will have turned gray.

The DNS tab

Pause Cloudflare

Alternatively, you can choose to pause Cloudflare after logging in.

Step 1

Click on your connected site from the list.

The Cloudflare dashboard

Step 2

Then, scroll down until you see the Advanced Actions section in the sidebar. Click on the Pause Cloudflare on Site link.

The bottom on the Cloudflare dashboard page

Step 3

A pop-up will be displayed on the page that asks you to confirm you want to pause Cloudflare. Go ahead and click the Confirm button.

The pop-up to confirm pausing Cloudflare

Go into Development Mode

If you don’t want to pause or disable Cloudflare, you can keep it running, but place it in development mode so you can still troubleshoot error 520.

Step 1

After logging into Cloudflare, click the Caching tab toward the top of the page.

Cloudflare’s Caching page

Step2

Next, scroll down to the Development Mode section and click the Off toggle button. It should now say “On.”

The Caching page

Checking Your Server’s Error Logs

Now that you have disabled, paused or put Cloudflare into development mode, you can troubleshoot error 520 by checking your server’s error logs.

Finding your error log can vary between hosts so check with yours if you’re unsure of where to find your error logs.

If your hosting provider uses cPanel, you can follow the steps below.

Step 1

Log into cPanel and in the dashboard, go to the Metrics section. Then, click the Errors button.

The cPanel dashboard

Step 2

The error log page displays errors in reverse chronological order as well as up to 300 of the most recent messages. The error log may display more messages if you or your host adjusted the settings.

The error log in cPanel

Checking Your Log for Error 520 Using MyKinsta

If you host your WordPress site with Kinsta, you can follow the steps below to check your error log.

Step 1

Log into MyKinsta and click on Sites in the menu on the left. Then, select the site you want to troubleshoot from the list on the page.

The MyKinsta dashboard

Step 2

Click on the Logs tab. By default, the error log is displayed. If you don’t see anything listed, it’s due to the fact that no errors on your site have occurred.

The Logs tab

How to Interpret the Error Log

Each message in an error log has a structure. If you understand it, you can interpret the error messages that come up.

The date and time of the message are listed first followed by the LogLevel directive which tells you about the severity level of the message.

Next up is the IP address of the client. This is who made the issue appear.

Finally, the actual message is displayed and may contain a path to the affected file.

Here are the LogLevel severity levels which could be listed in your error log’s messages:

  • Emerg – This lets you know the issue is an emergency and the server is unavailable.
  • Alert – Action should be taken immediately if you see this level.
  • Crit – This denotes a critical condition.
  • Error – This means an error has occurred.
  • Warn – A message with this level is a warning about an issue that requires your attention, but isn’t critical.
  • Notice – This means your server is normal, but there are significant details about the condition of your server that is available.
  • Info – General information is available with this level.
  • Debug – These messages contain details when you have debugging enabled.

Use a cURL Command to Troubleshoot Error 520

You can also use a cURL command to troubleshoot error 520 by testing against the origin server.

Be sure to change “you-site.com” to your actual domain. You also need to update “123.45.6.789” with your site’s IP address. If you changed your login page, you should also change the “wp-login.php” part.

A successful response header would look similar to the example below:

If you see something like this, it means everything’s okay and the site was reached without an error 520 response.

On the other hand, if you see a response header similar to the example below, it means the 520 error has occurred when Cloudflare was active:

How to Generate a HAR File

A HAR is an HTTP archive file. It contains archives for requests that are going to the server of origin and also through Cloudflare.

It can help you with troubleshooting because it compares response headers coming from the origin server and Cloudflare when it’s used as a proxy.

It’s also used to confirm that the headers are too large if that’s why error 520 has appeared.

You can create a HAR file with your browser with the steps below:

Chrome

Step 1

Open your browser and right-click on the page. Then, select Inspect.

The page has been right-clicked in Chrome.
Step 2

Once the panel has opened, click the Network tab and make sure there’s a red circle button toward the top, left-hand side of the panel. If it’s gray, click it.

The Chrome developer tool
Step 3

Check the Preserve log option next to the record button and then click the clear button.

The Chrome developer tool
Step 4

Load the page that’s bringing up error 520. Then, right-click anywhere in the messages area of the Chrome developer tool.

Select the Save as HAR with Content and save the file to your computer.

A message in Chrome’s developer tool has been right-clicked.

Firefox

Step 1

Open Firefox and right-click anywhere on the page. Then, select Inspect Element.

A page has been right-clicked in Firefox.
Step 2

Go to the Network tab and visit the page that has the 520 error coming up. Right-click on messages in the panel and select the Save All as HAR option.

Save the file to your computer.

The Firefox developer tool Network tab

Edge

Step 1

Open the Edge browser and right-click the page. Select Inspect from the list.

The Edge browser
Step 2

Go to the Network tab and ensure the circular record button is red. If it’s not, click it. Check the Preserve log option, then the icon to clear the current messages.

The Network tab of the developer tool
Step 3

Go to the page where you’re experiencing error 520. Then, right-click on the messages in the developer tool panel and select the Save all as HAR with content option.

Save the file to your computer.

Safari

Step 1

Open Safari and right-click on the page for Windows or press CMD on your keyboard and click for Mac. Select Inspect Element from the list.

The Safari browser
Step 2

Go to the Network tab. Check the Preserve Log option, then go to the page with the error 520 issue.

The Safari developer tool panel
Step 3

Click the Export button and save the HAR file to your computer.

The Safari developer tool

Resolving the Common Reasons for Error 520

Now that you have your error log, search through it and see if you notice any one of the issues below. Then, follow the steps below to resolve the issue.

Origin Server PHP Application Crashed

One common issue that causes error 520 is that one of the PHP applications have crashed on your server. Restarting PHP will fix the error.

Step 1

Using SSH, you can enter the command below for Apache servers:

For Nginx servers, you can restart PHP using the command below:

Restart PHP in MyKinsta

If your site is hosted with Kinsta, you can restart PHP in a few clicks.

Step 1

Log into MyKinsta and click on Sites on the left. Then, click on your site from the list.

The MyKinsta dashboard
Step 2

Go to the Tools tab and click the Restart PHP button.

The Tools tab in the MyKinsta dashboard to restart PHP and resolve error 520

Cloudflare IP Addresses Aren’t Whitelisted

Another reason why the 520 error can occur is if Cloudflare’s IP addresses aren’t whitelisted. You can whitelist them, but the steps vary between hosting providers.

If you’re not sure how to whitelist IPs, contact your host, especially if you don’t find any settings for it.

At Kinsta, Cloudflare’s IP addresses are whitelisted by default so there’s no need to worry about this cause of the error. It also won’t impact the other reasons why the error occurs.

TCP Idle Timeouts Are Shorter Than 300 Seconds

The Transmission Control Protocol (TCP) could also be the cause of error 520.

TCP is a standard protocol that establishes and maintains a network connection. If the TCP is set to timeout in under 300 seconds, it could cause the 520 error to pop up.

You can change the TCP service timeout using a CLI command:

Headers Exceed 8 KB

This issue is typically due to too many cookies or cookies that are too large. The HAR file that you downloaded during the troubleshooting process will show you if this is the problem.

Cloudflare has a limit of 8 KB that can be used for headers.

If you authored a plugin that requires too many cookies or has too much data in its cookies, try to reduce them. Or, if you’re using a lot of plugins that all need cookies, remove some of them (you should always use quality plugins).

Elementor Users

When you try to edit your WordPress site using Elementor and you get the 520 error – “Web server is returning an unknown error” – you can check the following.

First, you can try a different web browser.

If the problem still exists and your site is behind Cloudflare you may have a problem with Cloudflare’s Rocket Loader feature.

The issue was caused by Rocket Loader automatically changing the scripts to load asynchronously, which breaks the site editor and prevents you making changes.
By creating rules in Cloudflare you can solve this issue.

For Elementor pages: Site URL/*elementor*
For Elementor templates: Site URL/?elementor_library=*

Empty Response from Your Server

This problem occurs when your site lacks an HTTP status code or response body. To resolve it, make sure your DNS settings are set correctly for your site’s domain.

The steps involved to check your settings depends on your DNS host. If your hosting plan has DNS bundled with it, then check with your hosting provider.

It may be important to note that if you updated your DNS settings, it may take up to 72 hours for your site to propagate. This means your site may be unavailable for up to three days.

After changing your DNS settings, you need to clear your site’s cache. If you have a caching plugin installed on your WordPress site, you can check its documentation if you’re unsure of how to clear your site’s cache from the plugin’s settings.

You can also clear your site’s cache through your hosting provider. Be sure to check with them if you need to know how to do this for your site.

If your site is hosted with Kinsta, you can click Sites in the menu, then on your listed site.

Then, click the Tools tab and click the Clear cache button.

The Tools tab in MyKinsta

If you have updated your DNS settings, your site is available again, you cleared your site’s cache and you still are experiencing error 520, restart your server.

If you don’t find the option in your settings, contact Kinsta’s support team and we’ll help you with this.

Missing Response Headers

According to Mozilla,

“A response header is an HTTP header that can be used in an HTTP response and that doesn’t relate to the content of the message. Response headers, like Age, Location or Server are used to give a more detailed context of the response.”

Missing response headers can be caused by a multitude of reasons.

Your best bet with this issue is to use a debugging tool like Fiddler to debug the issue and see exactly what the problem is so you can fix it.

Server not Returning Proper HTTP Error Responses

When your server sent an invalid error response, it could have caused the 520 error. This means the message didn’t fit in with the standard list of HTTP response codes.

It’s caused by your server or it could also be something on your server such as PHP applications or possibly plugins used on your WordPress site.

If you can’t find the source for the improper error code to fix it, try contacting support for further help.

Enabling Cloudflare Again

Check to see if you receive the error again. If you do, keep Cloudflare disabled and continue troubleshooting.

If the 520 error has been resolved, enable Cloudflare again.

Step 1

To do this, log into Cloudflare and if you disabled Cloudflare by turning the cloud gray in your account, start by selecting your site from the list.

The Cloudflare dashboard

Step 2

Click the DNS tab, then click the gray cloud to re-enable Cloudflare.

The DNS tab on the Cloudflare site

Restoring Cloudflare After Pausing It

Step 1

If you paused Cloudflare earlier, restore it by logging into Cloudflare and click on your listed site in the dashboard.

The Cloudflare dashboard

Step 2

Then, go to the Overview tab and scroll down to the bottom of the page until you see the Advanced Actions sections in the sidebar on the right-hand side of the page.

Click the Enable Cloudflare on Site link.

The Cloudflare dashboard

Turning off Development Mode

Step 1

If you have previously turned on Cloudflare’s development mode, you can turn it off by logging in. Then, click your site that’s listed on the page.

The Cloudflare dashboard

Step 2

Next, go to the Caching tab.

Caching tab on Cloudflare’s site

Step 3

Scroll down to the Development Mode section and click the toggle button that’s currently set to “On.”

The Caching Tab

What to Do If All Else Fails

If you’re still seeing issues, contact Cloudflare support.

Provide them with the following details:

  • Full URL(s) of the requested resource when the error occurred.
  • Cloudflare’s Ray ID from the page where you saw the error 520 message.
  • The output from http://your-site.com/cdn-cgi/trace, but be sure to replace “your-site.com” with your actual domain name.
  • Two HAR files: One from when Cloudflare was enabled for your site and one more from when you had Cloudflare disabled.
Click to Tweet

Summary

The 520 error can seem confusing, especially since it’s a Cloudflare error. But, it has to do with an error with your server that causes Cloudflare to not connect.

The steps above are the solutions to the most common causes of error 520. If you’re still having issues after trying them, you might want to contact Cloudflare or your hosting support.

Suggested reading: How to Set up Cloudflare APO for WordPress.


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What is a 500 internal server error? How to fix the common message you receive when a website won't load

Home Tech
500 internal server error
Waldemarus/Getty Images
  • A 500 internal server error indicates a non-specific problem with a website's server.
  • It usually refers to a problem on the web server, but there are some troubleshooting steps you can take on your computer.    
  • A server admin can usually solve a 500 error by deactivating new plug-ins and checking out recent software updates.

Unfortunately, the HTTP 500 internal server error message is agonizingly unhelpful; it's a generalized, catch-all that mostly indicates that the problem can't be more accurately categorized as a different, more specific error.

This internal server error points to a general problem that affects all users and has to be fixed by the website's administrator. On rare occasions, it might be a problem that might affect a single user and can be solved by them.  

What is a 500 internal server error?

The HTTP 500 internal server error is a general-purpose error code that means there is a problem on the website's server, but the exact problem couldn't be definitively identified. In other words, the server doesn't know what the exact problem is. 

[500-internal-server-error1.png: Websites may display the 500 internal server error in a variety of ways, but it usually includes the code 500. / 500 internal server error]
Google; Dave Johnson

This 500 error code can appear in a number of ways, but in most cases the error will either include the code 500, the phrase "internal server error," or both. Because this error is part of the HTTP specification for websites, it can appear in any web browser and any kind of computer, including on mobile devices. 

500 internal server error causes 

Because the 500 error is non-specific, it can take a little detective work to understand what is happening. In general, you can classify this as a problem with the website server's software or configuration, such as one of these issues:

  • Permissions issues. Software might be blocked from doing its job because permissions are misconfigured.
  • Third-party software, plug-ins or extensions are not working correctly. This is especially likely if a plug-in was recently added that conflicts with other software, or an update means the system is now incompatible with an older plug-in. 
  • Other configuration issues. For example, the htaccess file is corrupted or the PHP memory limit has been exceeded. 

How to get rid of a 500 internal server error on a website you're visiting

In general, only the website administrator can solve most 500 errors because they are rooted in the software on the server. But sometimes, the problem can be at the user's end of the connection. If you run into a 500 internal server error, you might want to try a few troubleshooting steps to see if the problem can be resolved.

  • Close the browser or restart your computer. This is relatively easy to try, so it should be your first line of troubleshooting: Close the web browser and then restart it to see if that solves the problem. You can also turn the computer off and back on again as well.
  • See if the site is down. Visit Downdetector and search for the website to see if it's online. Downdetector doesn't track smaller websites, so you can also try Down.com or Down for Everyone or Just Me. 
  • Wait a while.

Errors may occur when working with the application through the command line. When errors occur, Kaspersky Endpoint Security shows an error message, for example. Kaspersky Endpoint Security can also show additional information in the form of a code, for example, (see the sbt internal consistency error below).

Error code

Description

License key for Kaspersky Endpoint Security is already in use on this computer.

License expired. Database update is not available.

Key not found.

Digital signature missing or corrupted.

Data corrupted.

Key file corrupted.

License expired or license key expired.

Key file not specified.

Cannot apply key file.

Failed to save data.

Failed to read data.

I/O error.

Databases not found.

Licensing library not loaded.

Databases corrupted or updated manually.

Databases are corrupted.

Cannot use invalid key file to add an additional key.

System error.

Black list of keys corrupted.

Digital signature of file does not match the digital signature of Kaspersky.

Cannot use a key for non-commercial license as a key for commercial license.

The beta license is required to use the beta version of the application.

Key file not compatible with this application.

Key blocked by Kaspersky.

Application has already been used under rf trial license. Cannot add trial key again.

Key file corrupted.

Digital signature missing, corrupted, or does not match the digital signature of Kaspersky.

Cannot add a key if the corresponding non-commercial license has expired.

The date the key file was created or used is invalid. Check the system date.

Cannot add a key for trial license: another key for trial license is already active.

Black list of keys corrupted or missing.

Update description missing or corrupted.

Error in license 500 internal server error error jib service data.

Cannot use invalid key file to add an additional key.

Error sending request to activation server. Possible reasons: Internet connection error or temporary problems on the activation server. Try to activate the application with the activation code later. If this error persists, 500 internal server error error jib, contact your Internet provider.

Error in response from activation server.

Cannot obtain response status.

Error occurred when saving temporary file.

Activation code has been entered incorrectly or system date is incorrect. Check the system date on the computer.

Key file not compatible with this application, or license expired. You cannot activate Kaspersky Endpoint Security by using a key file for a different application.

Failed to receive key file. Incorrect activation code was entered.

Activation server has returned error 400.

Activation server has returned error 401.

Activation server has returned error 403.

Activation server has returned error 404.

Activation server has returned error 405.

Activation server has returned error 406.

Authentication on proxy server required. Check the network settings.

Request timeout expired.

Activation server has returned error 409.

Activation server has returned error 410.

Activation server has returned error 411.

Activation server has returned error 412.

Activation server has returned error 413.

Activation server has returned error 414.

Activation server has returned error 415.

Internal server error.

Functionality not supported.

Invalid response from gateway. Check the network settings.

Service unavailable (HTTP Error 503).

Gateway response timeout has expired. Check the network settings.

The protocol is not supported by the server.

Unknown HTTP error.

Invalid resource ID.

Invalid URL.

Invalid destination folder.

Memory allocation error.

Error converting parameters to ANSI string (URL, folder, agent).

Error creating worker thread.

Worker thread already running.

Worker thread not running.

Key file not found on activation server.

Key is blocked.

Internal error of activation server.

Not enough data in activation request.

License key expired.

Incorrect system date is set on the computer.

Trial license has expired.

License expired.

The limit of application activations has been exceeded for the specified code.

Activation procedure ended with a system error.

Cannot use a key for non-commercial license as a key for commercial license.

Activation code is required.

Cannot connect to activation server.

Activation server is unavailable, 500 internal server error error jib. Please check your Internet connection settings and retry activation.

Application database release date exceeds the license expiration date.

Cannot replace the active key with an expired key.

Cannot add an additional key if it expires before the current license.

Updated subscription key missing.

Incorrect activation code (checksum does not match).

Key already active.

License types that correspond to active and additional keys do not match.

Component not supported by license.

Unable to add subscription key as an additional key.

Transport layer general error.

Failed to connect to activation server.

Invalid URL format.

Failed to convert proxy server address.

Failed to convert server address. Check the Internet connection settings.

Failed to connect to activation server or proxy server.

Remote access denied.

Response timeout has expired.

Error sending HTTP request.

SSL connection error.

Operation interrupted by callback.

Too many forward attempts.

Recipient check failed.

Empty response from activation server.

Error sending data.

Error receiving data.

Local SSL certificate error.

SSL encryption error.

Server SSL certificate error.

Invalid contents of network packet.

User access denied.

Invalid SSL certificate file.

Failed to establish SSL connection.

Failed to send or receive network packet. Please try again later.

Invalid file with revoked certificates.

SSL certificate request error.

Unknown server error.

Internal server error.

No license key available for the activation code entered.

Active key blocked.

Required parameters of application activation request are missing.

Incorrect user name or password.

Incorrect activation code sent to server.

Activation code is invalid for Kaspersky Endpoint Security. Unknown intended application for the activation code.

Request is missing an activation code.

License expired (according to data from the activation server).

Number of activations with this code has been exceeded.

Invalid format of request ID.

Activation code is invalid for Kaspersky Endpoint Security. Activation code is intended for a different Kaspersky application.

Cannot update license key.

Activation code is invalid for this region.

Activation code is invalid for the Kaspersky Endpoint Security language version.

Additional access to the activation server is required.

Activation server has returned error 643.

Activation server has returned error 644.

Activation server has returned error 645.

Activation server has returned error 646.

Activation code format not supported by activation server.

Invalid activation code format.

Incorrect system time is set on the computer.

Activation code is invalid for the Kaspersky Endpoint Security version.

Subscription expired.

Number of activations exceeded for this license key.

Invalid siocsifflags unknown error 132 backtrack signature of license key.

Additional data is needed.

User data verification failed.

Subscription inactive.

Activation server is under maintenance.

Unknown error of Kaspersky Endpoint Security.

Invalid parameter transferred (for example, an empty list of activation server addresses).

Incorrect activation code.

Invalid user name.

Invalid user password.

Invalid response from activation server.

Activation request interrupted.

Activation server returned an empty forwarding list.

HTTP Error 500.19 - internal server error when you open an IIS Webpage

  • Article
  • 6 minutes to read

This article resolves a problem in which you receive an "HTTP 500.19" error message on a web application in Internet Information Services (IIS) 7.0 and later versions.

Original product version:   Internet Information Services 7.0 and later versions
Original KB number:   942055

To resolve this error, check the following sections for the appropriate error code information.

HRESULT code 0x8007000d

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x8007000d
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem occurs because the ApplicationHost.config or Web.config file contains a malformed or unidentified XML element. IIS can't identify the XML elements of the modules canon pc 1304 lens error are not installed. For example, IIS URL Rewrite module.

Resolution

Use one of the following methods:

  • Delete the malformed XML element from the ApplicationHost.config or Web.config file.
  • Check the unidentified XML elements, and then install the relevant IIS modules.

HRESULT code 0x80070021

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x80070021
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem can occur if the specified portion of the IIS configuration file is locked at a higher configuration level.

Resolution

Unlock the specified section, or don't use it at the higher level. For more information about configuration locking, see How to Use Locking in IIS 7.0 Configuration.

HRESULT code 0x80070005

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x80070005
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem occurs for one of the following reasons:

  • You're using IIS on a computer that is running Windows. Additionally, you configure 500 internal server error error jib website to use Universal Naming Convention (UNC) pass-through authentication to access a remote UNC share.
  • The IIS_IUSRS group doesn't have the appropriate permissions for the ApplicationHost.config file, the Rf file, or the virtual or application directories of IIS.

Resolution

Use one of the following methods:

  • Don't configure the website to use UNC pass-through authentication to access the remote UNC share. Instead, specify a user account that has the appropriate permissions to access the remote UNC share.

  • Grant the Read permission to the Rf group for the ApplicationHost.config or Web.config file. To do it, follow these steps:

    1. In Windows Explorer, locate the folder that contains the ApplicationHost.config file that is associated with the website, or locate the virtual directories or the application directories that contain the Web.config file that is associated with the website.

      Note

      The Web.config file may not be in the virtual directories or the application directories in IIS. Even in this situation, you have to follow these steps.

    2. Right-click the folder that contains the ApplicationHost.config file, or right-click the virtual or application directories that may contain the Web.config file.

    3. Select Properties.

    4. Select the Security tab, 500 internal server error error jib, and then Select Edit.

    5. Select Add.

    6. In the Enter the object names to select box, type <computername>\IIS_IUSRS, select Check Names, and then select OK.

      Note

      <Computername> is a placeholder for the computer name.

    7. Select the Read check box, and then select OK.

    8. In the Properties dialog box for the folder, 500 internal server error error jib, select OK.

      Note

      Make sure that the folder properties are inherited by the ApplicationHost.config and Web.config files so that IIS_IUSRS has the Read permission for those files.

HRESULT code 0x800700b7

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x800700b7
Description of 500 internal server error error jib The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem may occur if there's a duplicate entry for the specified rf section setting at a higher level in the configuration hierarchy (for example, ApplicationHost.config or Web.config file in a parent site or folder). The error message itself points out the location of the duplicate entries.

Resolution

Examine the specified configuration file, and compare it with its parent ApplicationHost.config or Web.config file to check for duplicate entries, as suggested by the error message. Either remove the duplicate entry, or make the entry unique. For example, this problem may occur because the ApplicationHost.config file has a duplicate entry for the following code:

To resolve this problem, delete the duplicate entry in the ApplicationHost.config file for the authorization rule. To do it, follow these steps:

  1. Select Start, type Notepad in the Start Search box, right-click Notepad, and then select Run as administrator.

    Note

    If you're prompted for an administrator password or for a 500 internal server error error jib, type the password, or select Continue.

  2. On the File menu, select Open, type %windir%\System32\inetsrv\config\applicationHost.config in the File name box, rf, and then select Open.

  3. In the ApplicationHost.config file, delete the duplicate entry that resembles the following code:

HRESULT code 0x8007007e

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x8007007e
Description of HResult
The requested page cannot be accessed because the related configuration data for the 500 internal server error error jib is invalid.

Cause

This problem occurs because the ApplicationHost.config or Web.config file references a module or a DLL that is invalid or doesn't exist.

Resolution

In the ApplicationHost.config or Web.config file, locate the module reference or the DLL reference that is invalid, and then fix the reference. To determine which module reference is incorrect, enable Failed Request Tracing, and then reproduce the problem.

HRESULT code 0x800700c1

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x800700c1
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem can occur if the bitness of the specified module is different than that of the application pool hosting the application, 500 internal server error error jib. For example, you're trying to load a 32-bit component into a 64-bit application pool. This problem may also occur if the specified module is corrupted.

Resolution

Make sure that the specified module's bitness is the same as that of the hosting application pool. Also, make sure that the module is not corrupted.

HRESULT code 0x8007010b

Error message:

Server Error in Application "application name"
HTTP Rf 500.19 – Internal Server Error
HRESULT: 0x8007010b
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

This problem can occur if the specified content directory cannot be accessed.

Resolution

  • Verify that the file path exists.
  • Verify that the file path is correctly named.
  • Verify that the file path has the correct file-level permissions set.
  • Verify that the file path is pointing to a valid file system type.

If you aren't sure what the file path is, use the Process Monitor or Failed Request Tracing tool to identify it.

HRESULT code 0x8007052e

Error message:

Server Error in Application "application hts home error HTTP Error 500.19 – Internal Server Error
HRESULT: 0x8007052e
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.

Cause

The default process identity in IIS doesn't have sufficient permissions to open the Web.config file on a remote share.

Resolution

Verify that the application pool identity account of this web application has sufficient permissions to open the Web.config file.

HRESULT code 0x80070003

Error message:

Server Error in Application "application name"
HTTP Error 500.19 – Internal Server Error
HRESULT: 0x80070003
Description of HRESULT
Cannot read configuration file.

Cause

This error is caused by a lack of permission or by a physical path that doesn't match the path for the virtual directory. For example, no Web.config exists under the web app physical root path.

Resolution

  • Verify that the Web.config path exists and has correct permissions set.
  • Collect Process Monitor logs to get more information about the error.

Fix break IIS configuration file issue when you update windows

As a general safety rule, all configuration files (not limited to IIS) should be backup before installing any update. If you use Virtual Machines, take a snapshot of the Virtual Machine before you update it. This advice isn’t limited to Windows updates.

What is a 500 internal server error? How to fix the common message you receive when a website won't load

Home Tech
500 internal server error
Waldemarus/Getty Images
  • A 500 internal server error indicates a non-specific problem with a website's server.
  • It usually refers to a problem on the web server, but there are some troubleshooting steps you can take on your computer.    
  • A server admin can usually solve a 500 error by deactivating new plug-ins and checking out recent software updates.

Unfortunately, the HTTP 500 internal server error message is agonizingly unhelpful; it's a generalized, catch-all that mostly indicates that the problem can't be more accurately categorized as a different, more specific error.

This internal server error points to a general problem that affects all users and has to be fixed by the website's administrator. On rare occasions, it might be a problem that might affect a single user and can be solved by them.  

What is a 500 internal server error?

The HTTP 500 internal server error is a general-purpose error code that means there is a problem on the website's server, rf, but the exact problem couldn't be definitively identified. In other words, the server doesn't know what the exact problem is. 

[500-internal-server-error1.png: Websites may display the 500 internal server error in a variety of ways, but it usually includes the code 500. / 500 internal server error]
Google; Dave Johnson

This 500 error code can appear in a number of ways, but in most cases the error will either include the code 500, the phrase "internal server error," or both. Because this error is part of the HTTP specification for websites, it can appear in any web browser and any kind of computer, including on mobile devices. 

500 internal server error causes 

Because the 500 error is non-specific, it can take a little detective work to understand what is happening. In rf, you can classify this as a problem with the website server's software or configuration, such as one of these issues:

  • Permissions issues. Software might be blocked from doing its job because permissions are misconfigured.
  • Third-party software, plug-ins or extensions are not working correctly. This is especially likely if a plug-in was recently added that conflicts with other software, or an update means the system is now incompatible with an older plug-in. 
  • Other configuration issues. For example, the htaccess file is corrupted or the PHP memory limit has been php aeyrwbz error to get rid runtime error r6034 winamp a 500 internal server error on a website you're visiting

    In general, only the website administrator can solve most 500 errors because they are rooted in the software on the server. But sometimes, the problem can be at the user's end of the connection. If you run into a 500 internal server error, you might want to try a few troubleshooting steps to see if the problem can be resolved.

    • Close the browser or restart your computer. This is relatively easy to try, so it should be your first line of troubleshooting: Close the web browser and then restart it to see if that solves the problem. You can also turn the computer off and back on again as well.
    • See if the site is down. Visit Downdetector and search for the website to see if it's online. Downdetector doesn't track smaller websites, so you can also try Down.com or Down for Everyone or Just Me. 
    • Wait a while.

As marketers, we love high numbers. 500 post views? 500 new leads today? Fantastic!

woman using a laptop computer to resolve the rf, sometimes high numbers aren’t so great. The last thing any website owner wants to see when opening their homepage is this:

an example. ofan error screen displaying the HTTP Error 500 message in wordpress, is currently unable to handle this request

Image Source

When you get a 500 Internal Server Error on your WordPress website, it brings your entire operation to a standstill and leaves you rushing to find a solution.

The good news is that this is a common problem in WordPress. And, with a bit of investigation, there’s usually an easy solution, rf. In this article, I’ll show 500 internal server error error jib why your site "is currently unable to handle this request" and how to get rid of this message.

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HTTP Error 500 in WordPress: What Does "is currently unable to handle this request" Mean?

When you visit a website, your browser makes a request to a web host, asking to send you a web page. If something is wrong with your website that prevents the hosting server from delivering that page to your browser (i.e. it is unable to handle the 500 internal server error error jib, it will instead send you an error message. This is a 500 Internal Server Error.

An HTTP 500 error can be caused by many different things, but it’s probably not an issue with the host server itself. It's more likely that the host can’t retrieve the contents of your WordPress site for some reason.

With the WordPress CMS, 500 internal server error error jib, the most common causes of a 500 Internal Server Error are:

  • faulty plugins or themes
  • a broken .htaccess file, and/or
  • the PHP memory limit being exceeded.

Occasionally, the issue might also come from your hosting server.

The vagueness of a 500 makes it pesky to deal with — the good news is that trying a few repairs will almost certainly solve your problem. Here's what to do:

How to Fix the 500 Internal Server Error in WordPress

  1. Back up your website.
  2. Enable the WordPress debugging feature.
  3. Deactivate your plugins.
  4. Disable your currently active theme.
  5. Check your .htaccess file.
  6. Check your PHP memory limit.
  7. Replace your WordPress core rstrui.exe application error. Back up your website.

    Fixing your issue will require changing some things on your site, 500 internal server error error jib, including some alterations to with your plugins, themes, 500 internal server error error jib, and possibly your WordPress core files. Even though your site is down, 500 internal server error error jib, make a backup of your files in case you lose data and need to backtrack.

    Save your backup in a safe location. Hopefully you won’t need it, rf, but it's good to have just in case.

    2. Enable the WordPress debugging feature.

    WordPress includes a handy debugger to help you troubleshoot issues like this. When something goes wrong, the error log will report the specifics of the problem.

    The debugger disabled by default — first enable it with the steps below:

    1. Access your website via FTP.

    2. Open your public_html folder, or whichever directory contains your WordPress files.

    3. Locate and right-click the wp-config.php file, then choose View/Edit.

    4. With the file open, scroll to the bottom of the file and paste the following line of code:

    This code tells WordPress to log errors on your website.

    5. Save your changes and reload your website. On the error screen, you might see a more detailed report that identifies the source of the issue — this could point to a specific plugin or file. If the source of the problem is still unclear, read on.

    Once you’re finished using the debugger, remember to disable it by removing the code you added above and saving the file, being careful not to change anything else!

    3, 500 internal server error error jib. Deactivate your plugins.

    A likely cause of this error is that one of your plugins (or a combination of plugins) is causing your backend to malfunction. The best way to test this is by deactivating all your plugins, then narrowing down to the culprit(s).

    If you can access the administrator account, try the following:

    1. From the dashboard, rf Plugins > Installed Plugins.

    2. Check the box next to Plugin to select all your plugins.

    3. Choose Deactivate from the Bulk Actions drop-down menu, then click Apply.

    4. Refresh your site. If you no longer see the error, start activating each plugin one by one and reloading your website after each activation to identify the faulty plugin.

    If you don’t have access to the administrator controls, you will need to connect to your server using the file transfer protocol (FTP). After connecting, you’ll see all your files for your WordPress website. 500 internal server error error jib these steps:

    1. Open the public_html folder (or wherever your WordPress files are stored on your server), then open the wp-content folder.

    2. Rename your plugins folder “plugins_old”.

    3. Refresh your website. If your site works, rename your plugins_old folder back to “plugins”.

    4. Within the plugins folder, rename each plugin folder one at a time until you find the plugin that causes the bug.

    If you find a specific plugin causing the error, rf, replace the plugin or notify the 500 internal server error error jib developer.

    4. Disable your currently active theme.

    If plugins aren’t the issue, 500 internal server error error jib, your WordPress theme might be, especially if it comes from a third-party developer. To check this, start by temporarily replacing your current theme with a default WordPress theme. If you can access the administrator controls, follow these steps:

    1. Select Appearance > Themes from the WordPress dashboard.

    2. Activate any default WordPress theme, such as Twenty Nineteen.

    activate theme screen to resolve the ""is currently unable to handle this request". HTTP 500 error" in WordPress

     

    3. Check your website for the HTTP 500 error message.

    If you can’t get into the admin 500 internal server error error jib, you’ll need to use an FTP client to access the website. Then, do the following:

    1. Open the public_html folder (or wherever your WordPress files are stored), then open the wp-content folder.

    2. Open the themes folder and look for your active theme folder.

    3. Add “_old” to the end of the name of your active theme folder. This disables the theme.

    4. Refresh your website. If it works, you’ve found the problem. Contact the theme developer about the error and ask for the latest version of the theme.

    5. Check your .htaccess file.

    The next likely cause of a 500 Internal Server Error in WordPress is a corrupted .htaccess file, located in the root directory of your website files (usually public_html). This file contains various directions for your host server to follow, like allowing password-protection for web rf and redirecting URLs.

    Like other source files, any typo or incorrect modification in .htaccess will break the code and potentially your site. Follow these steps to make sure it’s working:

    1. Connect to your server with FTP or your cPanel dashboard.

    2, 500 internal server error error jib. Open your public_html folder (or whichever folder is your site’s root directory).

    3. Find the .htaccess file. Your server might hide this file by default, in which case change the view settings to reveal it. Rename the .htaccess file to something like .htaccess_test.

    4. Refresh your website. If you no longer see the HTTP 500 error, this means .htaccess is the source of the error. If you still see a 500, .htaccess is not the issue and you can skip to the next step, checking your PHP memory limit.

    5. To repair .htaccess, you just need to replace it with a new one. From your WordPress dashboard, select Settings > Permalinks.

    6. Click the Save Changes button at the bottom of the page. This replaces the old .htaccess file.

    6. Check your PHP memory limit.

    Your site’s PHP memory limit is allotted by your WordPress installation and by your host. If your site exceeds its memory capacity, this throws a 500 Internal Server Error. To increase your memory limit, try these steps:

    1. Access your server files with FTP or cPanel.

    2. Navigate to your site’s root directory and find the file wp-config.php. 500 internal server error error jib file contains the rule that determines your memory limit. Make a copy of this file as a backup.

    3. Open wp-config.php and search for the code “WP_MEMORY_LIMIT.” If you find it in the file, replace the value in this rule with '64M'. If not, 500 internal server error error jib, paste this line of code at the bottom of the file:

    4. Refresh your website. If the error is gone, you’ve found the issue.

    This is just a temporary fix — if you’ve exceeded your memory limit, you need to determine why. It’s possible your site has grown too large, in which case you should upgrade your hosting plan to accommodate your storage needs.

    However, another potential cause is a plugin or theme that is depleting your memory. To check this, contact your hosting provider and request a report of resource usage, or find this information yourself if your host has it accessible to you.

    7. Replace your WordPress core files.

    In some instances, your WordPress core files may have been improperly modified by a plugin or theme, 500 internal server error error jib. If you’ve gotten this far with no fix, it might be worth it to swap out your current core files with clean, unmodified ones. While you’ll still have your site data after this change, you might need to re-toggle some original settings.

    To replace WordPress core:

    1. Download WordPress and unzip it on your device.

    2, rf. In the main wordpress folder, delete wp-config-sample.php and the wp-content folder. If you don’t delete these files, they’ll overwrite your current site data.

    3. Use your FTP client to place the new WordPress core files on your hosting server and replace the current files.

    If 500 internal server error error jib more of a visual learner, here's a video that outlines all of these steps.

    If All Else Fails.

    As a last resort, reach out to your hosting provider support — the problem may actually be on your server in this case. Explain the troubleshooting you’ve conducted, and they’ll review your server configuration and logs to track down the cause. It’s in situations like this where quality customer service from your hosting provider really shines through.

    Internal server errors are so frustrating because they’re ambiguous and sometimes even misleading. Still, by following the steps above, you’ll hopefully come out of it with minimal impact to your WordPress website and your reputation.

    One more note: Be cautious about these types of errors when changing your website. We highly recommend testing out your new themes, plugins, and updates in a staging site. This way, if you get a 500, your visitors won’t see it on your live site and you won't be scrambling for a fix.

    wp

How to Fix Cloudflare’s “Error 520: Web Server Is Returning an Unknown Error”

When your site’s visitors see error 520 in their browser, it means Cloudflare is sending the message because your server returned an empty, unknown, or unexpected response.

The 520 error can be approached through troubleshooting first to find the cause and then fixed following these steps.

Let’s jump right in:

Troubleshooting Error 520

Since the 520 error is coming up because of an issue on your server, rf, you can troubleshoot the issue by looking in your error log.

Error 520

Disable Cloudflare

Before you start troubleshooting, it’s necessary to disable Cloudflare. This helps isolate the problem by ensuring the issue can be replicated without Cloudflare being a factor.

Step 1

Start by logging into Cloudflare. Then, find your site on the list and click on it.

The Cloudflare dashboard

Step 2

Next, click on the DNS tab, then on the orange cloud under the Proxy status section in the table. You’ll know Cloudflare was disabled because the cloud will have turned gray.

The DNS tab

Pause Cloudflare

Alternatively, you can choose to pause Cloudflare after logging in.

Step 1

Click on your connected site from the list.

The Cloudflare dashboard

Step 2

Then, scroll down until you see the Advanced Actions section in the sidebar. Click on the Pause Cloudflare on Site link.

The bottom on the Cloudflare dashboard page

Step 3

A pop-up will be displayed on the page that asks you to confirm you want to pause Cloudflare. Go ahead and click the Confirm button.

The pop-up to confirm pausing Cloudflare

Go into Development Mode

If you don’t want to pause or disable Cloudflare, you can keep it running, but place it in development mode so you can still troubleshoot error 520.

Step 1

After logging into Cloudflare, click the Caching tab toward the top of the page.

Cloudflare’s Caching page

Step2

Next, 500 internal server error error jib, scroll down to the Development Mode section and click the Off toggle button. It should now say “On.”

The Caching page

Checking Your Server’s Error Logs

Now that you have disabled, paused or put Cloudflare into development mode, you can troubleshoot error 520 by checking your server’s error logs.

Finding your error log can vary between hosts so check with yours if 500 internal server error error jib unsure of where to find your error logs.

If your hosting provider uses cPanel, you can follow the steps below.

Step 1

Log into cPanel and in the dashboard, go to the Metrics section. Then, click the Errors button.

The cPanel dashboard

Step 2

The error log page displays errors in reverse chronological order as well as up to 300 of the most recent messages. The error log may display more messages if you or 500 internal server error error jib host adjusted the settings.

The error log in cPanel

Checking Your Log for Error 520 Using MyKinsta

If you host your WordPress site with Kinsta, you can follow the steps below to check your error log.

Step 1

Log into MyKinsta and click on Sites in the menu on the left. Then, select the site you want to troubleshoot from the list on the page.

The MyKinsta dashboard

Step 2

Click on the Logs tab. By default, the error log is displayed. If you don’t see anything listed, it’s due to the fact that no errors on your site have occurred.

The Logs tab

How to Interpret the Error Log

Each message in an error log has a structure. If you understand it, 500 internal server error error jib, you can interpret the error messages that come up.

The date and time of the message are listed first followed by the LogLevel directive which tells you about the severity level of the message.

Next up is the IP address of the client. This is who made the issue appear.

Finally, the actual message is displayed and may contain a path to the affected file.

Here are the 500 internal server error error jib severity levels which could be listed in your error log’s messages:

  • Emerg – This lets you know the issue is an emergency and the server is unavailable.
  • Alert – Action should be taken immediately if you see this level.
  • Crit – This denotes a critical condition.
  • Error – This means an error has occurred.
  • Warn – A message with this level is a warning about an issue that requires your attention, but isn’t critical.
  • Notice – This means your server is normal, but there are significant details about the condition of your server that is available.
  • Info – General information is available with this level.
  • Debug – These messages contain details when you have debugging enabled.

Use a cURL Command to Troubleshoot Error 520

You can also use a cURL command to troubleshoot error 520 by testing against the origin server.

Be sure to change “you-site.com” to your actual domain. You also need to update “123.45.6.789” with your site’s IP address. If you changed your login page, you should also change the “wp-login.php” part.

A successful response header would look similar to the example below:

If you 500 internal server error error jib something like this, it means everything’s okay and the site was reached without an error 520 response.

On the other hand, if you see a response header similar to the example below, it means the 520 error has occurred when Cloudflare was active:

How to Generate a HAR File

A HAR is an HTTP archive file. It contains archives for requests that are going to the server of origin and also through Cloudflare.

It can help you with troubleshooting because it compares response headers coming from the origin server and Cloudflare when it’s used as a proxy.

It’s also used to confirm that the headers are too large if that’s why error 520 has appeared.

You can create a HAR file with your browser with the steps below:

Chrome

Step 1

Open your browser and right-click on the page. Then, select Inspect.

The page has been right-clicked in Chrome.
Step 2

Once the panel has opened, rf, click the Network tab and make sure there’s a red circle button toward the top, left-hand side of the panel. If it’s gray, rf, click it.

The Chrome developer tool
Step 3

Check the Preserve log option next to the record button and then click the clear button.

The Chrome developer tool
Step 4

Load the page that’s bringing up error 520. Then, right-click anywhere in the messages area of the Chrome developer tool.

Select the Save as HAR with Content and save the rf to your computer.

A message in Chrome’s developer tool has been right-clicked.

Firefox

Step 1

Open Firefox and right-click anywhere on the page. Then, select Inspect Element.

A page has been right-clicked in Firefox.
Step 2

Go to the Network tab and visit the page that has the 520 error coming up, 500 internal server error error jib. Right-click on messages in the rf and select the Save All as HAR option.

Save the file to your computer.

The Firefox developer tool Network tab

Edge

Step 1

Open the Edge browser and right-click the page. Select Inspect from the list.

The Edge browser
Step 2

Go to the Network tab and ensure the circular record button is red. If it’s not, click it. Check the Preserve log option, then the icon to clear the current messages.

The Network tab of the developer tool
Step 3

Go to the page where you’re experiencing error 520. Then, right-click on the messages in the developer tool panel and select the Save all as HAR with content option.

Save the file to your computer.

Safari

Step 1

Open Safari and right-click on the page for Windows or press CMD on your keyboard and click for Mac. Select Inspect Element from the list.

The Safari browser
Step 2

Go to the Network tab. Check the Preserve Log option, then go to the page with the error 520 issue.

The Safari developer tool panel
Step 3

Click the Export button and save the HAR file to your computer.

The Safari developer tool

Resolving the Common Reasons for Error 520

Now that you have your error log, search through it and 500 internal server error error jib if you notice any one of the issues below, 500 internal server error error jib. Then, follow the steps below to resolve the issue.

Origin Server PHP Application Crashed

One common issue that causes error 520 is that one of the PHP applications rf crashed on your server. Restarting PHP will fix the error.

Step 1

Using SSH, you can enter the command below for Apache servers:

For Nginx servers, you can restart PHP using the command below:

Restart PHP in MyKinsta

If your site is hosted with Kinsta, you can restart PHP in a few clicks.

Step 1

Log into MyKinsta and click on Sites on the left. Then, click on your site from the list.

The MyKinsta dashboard
Step 2

Go to the Tools tab and click the Restart PHP button.

The Tools tab in the MyKinsta dashboard to restart PHP and resolve error 520rf height="450">

Cloudflare IP Addresses Aren’t Whitelisted

Another reason why the 520 error can occur is if Cloudflare’s IP addresses aren’t whitelisted. You can whitelist them, but the steps vary between hosting providers.

If you’re not sure how to whitelist IPs, contact your host, especially if you don’t find any settings for it.

At Kinsta, Cloudflare’s IP addresses are whitelisted by default rf there’s no need to worry about this cause of the error. It also won’t impact the other reasons why the error occurs.

TCP Idle Timeouts Are Shorter 500 internal server error error jib 300 Seconds

The Transmission Control Protocol (TCP) could also be the cause of error 520.

TCP is a standard protocol that establishes and maintains a network connection. If the TCP is set to timeout in under 300 seconds, it could cause the 520 error to pop up.

You can change the TCP service timeout using a CLI command:

Headers Exceed 8 KB

This issue is typically due to too many cookies or cookies that are too large. The HAR file that you downloaded during the troubleshooting process will show you if this is the problem.

Cloudflare has a limit of 8 KB that can be used for headers.

If you authored a plugin that requires too many cookies or has too much data in its cookies, try to reduce them. Or, if you’re using a lot of plugins that all need cookies, remove some of them (you should always use quality plugins).

Elementor Users

When you try to edit your WordPress site using Elementor and you get the 520 error – “Web server is returning an unknown error” – you can check the following.

First, you can try a different web browser.

If the problem still exists and your site is behind Cloudflare you may have a problem with Cloudflare’s Rocket Loader rf issue was caused by Rocket Loader automatically changing the scripts to load asynchronously, which breaks the site editor and prevents you making changes.
By creating rules in Cloudflare you can solve this issue.

For Elementor pages: Site URL/*elementor*
For Elementor templates: Site URL/?elementor_library=*

Empty Response from Your Server

This problem occurs when your site lacks an HTTP status code or response body. To resolve it, make sure your DNS settings are set correctly for your site’s domain.

The steps involved to check your settings depends on your DNS host. If your hosting plan has DNS bundled with it, then check with your hosting provider.

It may be important to note that if you updated your DNS settings, it may take up to 72 hours for your site to propagate. This means your site may be unavailable for up to three days.

After changing your DNS settings, you need to clear your site’s cache. If you have a caching plugin installed on your WordPress site, you can check its documentation if you’re unsure of how to clear your site’s cache from the plugin’s settings.

You can also clear your site’s cache through your hosting provider. Be sure to check with them if you need to know how to do this for your site.

If your site is hosted with Kinsta, you can click Sites in the menu, then on your listed site.

Then, click the Tools tab and click the Clear cache button.

The Tools tab in MyKinsta

If you have updated your DNS settings, your site is available again, you cleared your site’s cache and you still are experiencing error 520, restart your server.

If you don’t find the option in your settings, 500 internal server error error jib, contact Kinsta’s support team and we’ll help you with this.

Missing Response Headers

According to Mozilla,

“A response header is an HTTP header that can be used in an HTTP response and that doesn’t relate to the content of the message. Response headers, like Age, Location or Server are used to give a more detailed context of the response.”

Missing response headers can be caused by a multitude of reasons.

Your best bet with this issue is to use a debugging tool like Fiddler to debug the issue and see exactly what the problem is so you can fix it.

Server not Returning Proper HTTP Error Responses

When your server sent an invalid error response, it could have caused the 520 error. This means the message didn’t fit in with the standard list of HTTP response codes.

It’s caused by your server or it could also be something on your server such as PHP applications or possibly plugins used on your WordPress site.

If you can’t find the source for the improper error code to fix it, try contacting support for further help.

Enabling Cloudflare Again

Check to see if you receive the error again. If you do, keep Cloudflare disabled and continue troubleshooting.

If the 520 error has been resolved, enable Cloudflare again.

Step 1

To do this, log into Cloudflare and if you disabled Cloudflare by turning the cloud gray in your account, start by selecting your site from the list.

The Cloudflare dashboard

Step 2

Click the DNS tab, then click the gray cloud to re-enable Cloudflare.

The DNS tab on the Cloudflare site

Restoring Cloudflare After Pausing It

Step 1

If you paused Cloudflare earlier, restore it by logging into Cloudflare and click on your listed site in 500 internal server error error jib dashboard.

The Cloudflare dashboard

Step 2

Then, rf, go to the Overview tab and scroll down to the bottom of the page until you see the Advanced Actions sections in the sidebar on the right-hand side of the page.

Click the Enable Cloudflare on Site link.

The Cloudflare dashboard

Turning off Development Mode

Step 1

If you have rf turned on Cloudflare’s development mode, you can turn it off by logging in. Then, click your site that’s listed on the page.

The <a href=Stop 0x7a kernel_data_inpage_error dashboard" width="1050" height="400">

Step 2

Next, go to the Caching tab.

Caching tab <b>500 internal server error error jib</b> Cloudflare’s site

Step 3

Scroll down to the Development Mode section and click the toggle button that’s currently set to “On.”

The Caching Tab

What to Do If All Else Fails

If you’re still seeing issues, contact Cloudflare support.

Provide them with the following details:

  • Full URL(s) of the requested resource when the error occurred.
  • Cloudflare’s Ray ID from the page where you saw the error 520 message.
  • The output from http://your-site.com/cdn-cgi/trace, but be sure to replace “your-site.com” with your actual domain name.
  • Two HAR files: One from when Cloudflare was enabled for your site and one more from when you had Cloudflare disabled.
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Summary

The 520 error can seem confusing, especially since it’s a Cloudflare error. But, it has to do with an error with your server that causes Runtime error 457 to not connect.

The steps above are the solutions to the most common causes of error 520. If you’re still having issues after trying them, you might want to contact Cloudflare or your hosting support.

Suggested reading: How to Set up Cloudflare APO for WordPress.


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