Internal Server Error

I had wordpress runing on my site https://www.upcomingeventsghana.com. i tried to access the admin page and this was the message i got. I backup the fills and did a new installation but the problem is still the same. Any help on how to resolve this problem? My site is current down. Urgent request
“
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.”

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.