HTTP 500 Internal Server Error means the website's server encountered an unexpected problem and couldn't complete the request.
Even if the website uses HTTPS, error 500 is generally a server-side error, not an SSL certificate error.
Common causes of HTTP 500
PHP fatal error — broken code, incompatible PHP version, or missing extensions.
.htaccess error — invalid rewrite rules or configuration.
Memory limit exceeded — PHP or application runs out of memory.
Database error — failed database connection or query.
File permissions — incorrect permissions or ownership.
Recent updates — faulty WordPress plugins, themes, or PHP patches.
Server configuration — Apache, LiteSpeed, or PHP-FPM issues. ( Contact your hosting provider )
How to fix it on cPanel
1. Check the error log
Open cPanel → Metrics → Errors. If you have WHM/root access, check the web server and PHP error logs.
2. Check .htaccess
Temporarily rename .htaccess to .htaccess_backup and test the website. Restore it if the error remains.
3. Verify PHP settings
Check the PHP version, required extensions, and memory limit in cPanel → MultiPHP Manager and MultiPHP INI Editor.
4. Contact Your Hosting Provider