Fixing the 500 Internal Server Error in WordPress: Step-by-Step Guide

Encountering the 500 Internal Server Error in WordPress can be frustrating and alarming. This server-side error prevents access to your website, affecting both users and administrators. Fortunately, it’s a common issue with well-documented solutions. In this guide, we’ll walk you through step-by-step methods to diagnose and fix the 500 Internal Server Error, ensuring your site returns to normal operation.

What is the 500 Internal Server Error?

The 500 Internal Server Error is a general HTTP status code indicating that something went wrong on the server, but the server could not be more specific about the exact problem. It often displays messages like:

This error can occur for several reasons, which we’ll explore below.

Common Causes of 500 Internal Server Error in WordPress

Corrupted .htaccess File - The .htaccess file controls important configurations. A minor corruption can trigger the 500 error.

PHP Memory Limit Exhaustion - In sufficient memory for PHP processes can cause the server to fail.

Plugin or Theme Conflicts - Incompatible or poorly coded plugins and themes can lead to server errors.

Incorrect File Permissions - Improper permissions for files and directories may prevent scripts from running.

Server Configuration Issues - Problems on the hosting server, such as outdated software, may also be responsible.

Step-by-Step Solutions to Fix the 500 Internal Server Error

Step 1: Backup Your Website

Before attempting any fixes, ensure you create a full backup of your site files and database. Use tools like UpdraftPlus or your hosting control panel’s backup feature.

Step 2: Check for a Corrupted .htaccess File

Access your website files via an FTP client or the cPanel file manager.
Locate the .htaccess file in the root directory.
Rename it to .htaccess_old.
Try reloading your site. If it works, the .htaccess file was the issue.
To generate a new .htaccess, go to Settings > Permalinks in your WordPress dashboard and click Save Changes.

Step 3: Increase PHP Memory Limit

				
					define('WP_MEMORY_LIMIT', '256M');

Step 4: Deactivate All Plugins

Use FTP or cPanel to navigate to the wp-content folder.
Rename the plugins folder to plugins_old to deactivate all plugins.
Check if the error is resolved. If it is, rename the folder back to plugins.
Reactivate plugins one by one to identify the problematic plugin.

Step 5: Switch to a Default Theme

Access your WordPress files via FTP.
Navigate to wp-content/themes and rename your active theme's folder.
WordPress will automatically switch to a default theme like Twenty Twenty-Three.
WordPress will automatically switch to a default theme like Twenty Twenty-Three.

Step 6: Check File Permissions

Step 7: Reinstall Core WordPress Files

Step 8: Contact Your Hosting Provider

If none of the above steps work, reach out to your hosting provider’s support team. They can check server logs and configurations for deeper issues.

Preventing the 500 Internal Server Error

Conclusion

The 500 Internal Server Error in WordPress can seem overwhelming, but with systematic troubleshooting, you can resolve it quickly. Follow the steps outlined above, and your site will be back up and running. If you have questions or additional tips, feel free to leave a comment below!

Ariful Islam