What Is a 500 Internal Server Error? How to Fix It Effectively
May 21, 2026Most internet users have encountered a situation where they could not access a website and instead saw the message “500 Internal Server Error” displayed on the screen. So, what exactly is a 500 Internal Server Error? Can this issue be fixed? The article below from Viettel IDC will help you better understand this common website error and how to resolve it.
What Is a 500 Internal Server Error?
When you visit a website and see the message “500 Internal Server Error,” it simply means that the website is experiencing a server-side issue.
A 500 Internal Server Error can appear in different formats, such as:
- “500 Internal Server Error”
- “500 Error”
- “HTTP Error 500”
- “500. That’s an error”
- “Temporary Error (500)”
- Or simply “500”
The appearance of the error message depends on the website’s configuration. Some websites even use creative or humorous illustrations to make the error page less frustrating for users.
In short, a 500 Internal Server Error is a general server error identified by the HTTP 500 status code. This error occurs when the web server encounters an issue and cannot properly display or deliver the requested content. Instead of loading the normal website interface, the server sends a 500 error page to your browser.
What Causes a 500 Internal Server Error?
Normally, websites display specific error details to help identify the issue. However, the 500 Internal Server Error is relatively generic, meaning browsers often cannot determine the exact cause.
In general, the error may be caused by the following issues:
- Corrupted .htaccess files
- Plugin conflicts
- Exceeding the PHP memory limit
- Web server software issues such as Apache HTTP Server or PHP errors
- Excessive traffic causing server overload
How to Fix a 500 Internal Server Error
Reload or Refresh the Web Page
In many cases, a 500 Internal Server Error is only temporary. You can often resolve it simply by refreshing the webpage.
To do this:
- Press the F5 key
- Or click the browser’s refresh/reload button
This will attempt to reload the website and reconnect to the server.
Clear Your Browser Cache
A corrupted browser cache may also trigger a 500 error. If this happens, clearing your browser cache is one of the easiest solutions.
After clearing the cache, restart your browser and try accessing the website again.
Delete Browser Cookies
In some cases, deleting browser cookies can help resolve the 500 Internal Server Error.
To fix the issue:
- Remove cookies related to the affected website
- Restart your browser
- Revisit the website
This may help eliminate corrupted session data causing the problem.
Additional Methods to Fix a 500 Internal Server Error
Because most 500 Internal Server Errors originate from the server side, additional troubleshooting methods are often required.
Incorrect File Permissions
One possible cause of a 500 error is incorrect file or folder permissions on the server.
If file permissions are configured improperly, the server may fail to access required resources. Check the error logs and verify that all files and directories have the correct permission settings.
PHP Server Timeout Errors
This issue commonly occurs on Linux or Unix servers running PHP.
If there is a problem with a PHP library or package and the server cannot process PHP files correctly, it may result in a 500 Internal Server Error.
In situations where the server is overloaded due to excessive traffic, the issue may not be immediately adjustable without upgrading server resources or optimizing performance.
Corrupted .htaccess File
A faulty or improperly configured .htaccess file can also cause a 500 Internal Server Error.
To troubleshoot:
- Check the .htaccess file for syntax errors or invalid code
- Rename, move, or temporarily delete the .htaccess file
- Refresh the website again
If the website works normally after removing the .htaccess file, the error was likely caused by incorrect .htaccess configurations.
Conclusion
Above are the most essential details to help you understand what a 500 Internal Server Error is and how to troubleshoot it effectively. Although this error is quite common, it can usually be resolved through basic server and browser troubleshooting methods.
Understanding the causes of HTTP 500 errors not only helps website administrators maintain stable performance but also improves the user experience for visitors accessing the website.
We hope this guide helps you successfully diagnose and fix 500 Internal Server Error issues quickly and efficiently.
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