It could be the script you have installed. What script do you have installed? Or did you code something yourself and put it up?
Before this, I do add application/x-httpd-phpv2 handler as ".do" extension in Apache handlers section. The reason I doing this is to change my php script extension to ".do" rather than ".php".
But immediately, I get the 500 Internal Server Error; and therefore I delete that handler. Even though, the page still shown me the same error.
Below is the error message:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator,
webmaster@radofeya.elementfx.com 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.