500 Internal Server Error

Quick Summary

A 500 Internal Server Error is a general server-side status code indicating that the web server encountered an unexpected condition and could not fulfill the request. This issue is typically tied to syntax errors in rewrite rules, incorrect file permissions, exhausted script resource limits, or broken script execution.

Common Causes & Step-by-Step Fixes

1. Inspect Server Directives (.htaccess / Server Configs)

Invalid configuration syntax or unsupported flags inside server directives are the leading cause of immediate 500 errors.

1. Log into your hosting control panel and open the File Manager.
2. Navigate to your website's root directory (public_html).
3. Locate your .htaccess file (enable Show Hidden Files in your File Manager settings if it is not visible).
4. Temporarily rename the file to .htaccess_bak.
5. Refresh your site in your browser. If the error disappears, a syntax error or incompatible directive within your original configuration file was the cause.
6. Re-create a basic default rewrite file or review recently added rules to isolate the exact line causing the crash.

2. Check File and Folder Permissions

Web servers require specific permission flags to read and execute files securely. Overly permissive settings (such as 777) or overly restrictive settings will trigger a 500 security error on managed environments.

1. Open your File Manager and inspect the permissions column for your root directory files and folders.
2. Ensure your directory permissions are set strictly to 755 (or drwxr-xr-x).
3. Ensure your file permissions are set strictly to 644 (or -rw-r--r--).
4. Apply these permission changes recursively across subdirectories if needed.

3. Review Web Server Error Logs

Rather than guessing what caused a generic 500 status code, inspect the server's raw error logs to identify the exact line of code or missing file triggering the failure.

1. In your hosting control panel, navigate to Metrics $\rightarrow$ Errors or open the Raw Log Manager.

2. Locate the most recent entries matching the exact timestamp of your failed browser request.

3. Look for specific log triggers such as:

   • Fatal error: Allowed memory size of X bytes exhausted
   • SoftException in Application: Directory is writeable by group
   • Option Directive not allowed here

4. Increase PHP Memory & Execution Limits

If a web application exceeds the memory ceiling or execution duration assigned to your account process, the web server halts execution and returns a 500 response.

1. Access the PHP Selector / Editor in your control panel.
2. Select your domain name and locate your environment directives.
3. Increase memory_limit to 256M or higher depending on application requirements.
4. Increase max_execution_time to 60 or 120 seconds.
5. Save changes and test the site again.

Still Having Issues?

• Infrastructure & Server Health: If your account is hosted on GaugeHosting.com, open a ticket under Support in your client portal. Our server engineers will inspect your raw system error logs, verify PHP-FPM worker status, and resolve infrastructure resource limits.
• Custom Code & Application Debugging: If you need assistance fixing complex web app bugs, repairing broken custom scripts, or optimizing database-driven web applications, contact the development team at Horizon Web Services for dedicated technical management.