The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@xxxx and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.
1. Check the CPanel Error Log.
2. Look for bad modules in .htaccess file.
In my case, this Internal Server Error happens every time I do a page delete. I learned that this was due to a plugin called “Image Upload HTTP Error Fix”. I just deactivate it so no more same errors after deleting pages.