Illustration showing a 500 Internal Server Error message on a computer screen with server rack icons

27 March 2026 Operator

What is a 500 Internal Server Error? A Complete Guide to Causes and Fixes

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The 500 Internal Server Error is a general-purpose error message that appearing when a server encounters an unexpected condition that prevents it from fulfilling a request. Unlike "404 Not Found" (which is a client-side issue), a 500 error confirms that the problem lies within the website's server or its configuration.

Common Causes:

Corrupted .htaccess File: Often caused by syntax errors or incompatible directives.
PHP Memory Limit: When a script exhausts the allocated memory on the server.
Faulty Plugins or Themes: Incompatible updates or coding conflicts.
Permission Errors: Incorrect file or folder permissions (usually should be 755 or 644).

How to Fix It? To resolve this, you should first check your server's error logs. Reloading the page, clearing the browser cache, or temporarily disabling plugins are the most effective first steps. If you are a developer, increasing the PHP memory limit in your php.ini file often solves the issue.