A 500 Internal Server Error is a generic message that means your web server encountered a problem but cannot tell you exactly what it is. Here is how to diagnose and fix it.
Step 1: Check the Error Log
- Log in to cPanel.
- Click Error Logs in the Metrics section.
- Look for the most recent errors — they will tell you exactly which file caused the problem.
Fix 1: Broken .htaccess File
A syntax error in .htaccess causes 500 errors immediately.
- In cPanel File Manager, navigate to public_html.
- Rename .htaccess to .htaccess_backup.
- Reload your website. If the 500 error is gone, the .htaccess file was the cause.
- If you are using WordPress, go to your WordPress admin > Settings > Permalinks and click Save Changes to regenerate a clean .htaccess.
Fix 2: PHP Memory Limit
- In cPanel File Manager, open (or create) a php.ini file in public_html.
- Add: memory_limit = 256M
- Save and reload.
Fix 3: File or Directory Permissions
Incorrect file permissions cause 500 errors. Correct permissions are:
- Files: 644
- Directories: 755
In cPanel File Manager, right-click a file or folder and click Change Permissions to fix this. Contact support if you need to fix permissions for multiple files at once.
Fix 4: Plugin or Theme Error (WordPress)
If the 500 error appeared after installing or updating a plugin or theme, disable it via File Manager (rename the plugin folder in wp-content/plugins/) or via the WordPress admin if accessible.
Fix 5: PHP Version Incompatibility
If you recently changed your PHP version, try switching back. Go to cPanel > Select PHP Version.
Note: If you have tried all of the above and the error persists, open a support ticket. Include your domain name and the error log content so we can investigate.
