How to Fix Internal Server Error in WordPress: Troubleshooting Guide 2023

Internal Server Error is a common issue that WordPress users encounter while managing their websites. This error can be frustrating as it makes your website temporarily unapproachable. Still, with the proper troubleshooting, you can resolve this error and get your website back over and dashing. In this article, we will claw into the causes of Internal Server Errors in WordPress and give you a comprehensive troubleshooting guide to fix them.

Understanding the Internal Server Error in WordPress:

The Internal Server Error, often represented by the HTTP status code 500, is a generic error message that indicates something has gone wrong on the server. Still, the server is unable to pinpoint the specific issue. It is a catch-all error that various factors can cause.

Common Causes of Internal Server Error:

Plugin or Theme Conflicts:

Conflicts between plugins or themes are a common cause of Internal Server Errors. When incompatible or poorly coded plugins or themes are activated simultaneously, they can clash and disrupt the normal functioning of your website.

Corrupted .htaccess File:

The .htaccess file is crucial in WordPress as it manages various server configurations. If this file becomes corrupted due to improper modifications or plugin misconfigurations, it can lead to Internal Server Error.

Insufficient PHP Memory Limit:

WordPress relies on PHP to run, and if the PHP memory limit allocated to your website is too low, it can cause Internal Server Error. This often happens when your website has resource-intensive plugins or themes that require more memory to function correctly.

Corrupted Core Files:

In rare cases, the core files of WordPress may become corrupted due to incomplete updates or server errors. When these files are compromised, it can trigger Internal Server Error.

Troubleshooting Internal Server Error:

To resolve Internal Server Error in WordPress, follow these troubleshooting steps:

Step 1: Check for Plugin or Theme Conflicts:

Disable all plugins and switch to a default theme. Then, reactivate each plugin individually and check if the error reoccurs. This helps identify the conflicting plugin or theme causing the issue.

Step 2: Generate a New.htaccess File:

Rename or delete the existing .htaccess file, and WordPress will generate a new one with default settings. This helps eliminate any corrupt configurations that might be triggering the error.

Step 3: Increase PHP Memory Limit:

Access your website’s wp-config.php file and add the following line of code:

define(‘WP_MEMORY_LIMIT’, ‘256M’);

This increases the PHP memory limit to 256MB, which can often resolve Internal Server Errors caused by insufficient memory allocation.

Step 4: Repair or Replace Corrupted Core Files:

Reinstalling WordPress core files can fix any corrupted files. Access the official WordPress website, download the latest version, and replace the existing core files on your server.

Step 5: Contact Your Web Host:

If none of the above steps resolve the Internal Server Error, you should contact your web hosting provider. They can investigate server-related issues and provide specific guidance to fix the error.

Additional Tips for Troubleshooting:

  • Clear your browser cache and cookies to ensure you are not viewing a cached version of the error.
  • Temporarily disable any caching plugins you have installed, as they can sometimes interfere with server configurations.
  • Switch to the default WordPress theme to avoid conflicts with your current theme.
  • Review the server logs for detailed error messages and clues about the cause of the Internal Server Error.


Get your WordPress website back up and running smoothly. Remember to systematically approach the troubleshooting process, check for the plugin or theme conflicts, generate a new .htaccess file, increase the PHP memory limit, repair or replace corrupted core files, and contact your web host.

In addition to the main troubleshooting steps, we’ve provided some additional tips to further assist you in resolving Internal Server Errors. Clearing browser cache and cookies, disabling caching plugins temporarily, testing with the default theme, and reviewing server logs can provide valuable insights and help you pinpoint the root cause of the error.

Remember that each website is unique, and the specific cause of the Internal Server Error may vary. Thus, it’s pivotal to approach the troubleshooting process with tolerance and attention to detail. However, feel free to seek help from WordPress support forums or consult a professional if you encounter difficulties or bear further backing.   

By following the way and tips outlined in this article, you will be equipped with the knowledge and tools to effectively attack Internal Server Errors in WordPress. Keeping your website running efficiently ensures a positive user experience and helps maintain your online presence.


Here are some frequently asked questions about fixing Internal Server Errors in WordPress:

What should I do if disabling plugins and switching to the default theme doesn’t resolve the Internal Server Error?

If disabling plugins and switching themes don’t fix the issue, you can generate a new .htaccess file, increase the PHP memory limit, and repair or replace corrupted core files. If none of these steps work, contacting your web hosting provider for further assistance is advisable.

How can I generate a new .htaccess file?

To generate a new .htaccess file, you can rename or delete the existing one. WordPress will automatically create a new .htaccess file with default settings. Make sure to take a backup of the original file before making any changes

How do I increase the PHP memory limit?

To increase the PHP memory limit, access your website’s wp-config.php file and add the following line of code before the line that says “/* That’s all, stop editing! Happy blogging. */”:
define(‘WP_MEMORY_LIMIT’, ‘256M’);
This code increases the PHP memory limit to 256MB. Save the changes and upload the file back to your server.

Can a corrupted theme cause Internal Server Error?

Yes, a corrupted theme could cause Internal Server Error. If you suspect your theme is causing the issue, switch to a default WordPress theme temporarily to see if the error persists. If the error disappears, it indicates that the theme is indeed the cause, and you may need to contact the theme developer for support or consider using a different theme.

Why should I review server logs when troubleshooting Internal Server Errors?

Reviewing server logs can provide valuable information about the specific error messages or events when the Internal Server Error was triggered. These logs can help you identify the root cause of the issue and guide you toward an appropriate solution. Access your server’s error logs or consult your hosting provider to obtain the necessary log files.

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