500 Internal Server Error

An HTTP 500 Internal Server Error indicates that the server encountered an unexpected condition that prevented it from fulfilling the request. This is a generic catch-all response when no more specific server error applies. End users see this when something goes wrong on the server side, while developers should check application logs for the underlying exception or fault.

Common causes

• Unhandled exceptions or runtime errors in server-side application code
• Misconfigured server settings such as incorrect .htaccess rules or malformed config files
• Database connection failures or query errors preventing the application from generating a response
• Incompatible or missing dependencies after a deployment or software update
• Insufficient file permissions preventing the server from reading or executing required resources

How to fix it

• Check the server error logs (e.g., /var/log/nginx/error.log or application-level logs) for the specific exception or stack trace
• Roll back recent deployments or code changes if the error appeared after an update
• Verify database connectivity and ensure credentials, hostnames, and ports are correctly configured
• Review server configuration files for syntax errors and validate them with built-in tools (e.g., nginx -t or apachectl configtest)
• Ensure all required dependencies and environment variables are present in the runtime environment

Related HTTP errors