500 internal server error

I keep trying to go to my website, https://www.thecaninedirectory.com, but I keep getting a 500 Internal Server Error that reads:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, [email protected] 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.

Apache/1.3.33 Server at thecaninedirectory.com Port 80

I’ve tried going to /wp-admin and the home page, but I keep getting that error. Does anyone know why?

Thanks
-Luke