Webmail not working getting " Internal Server Error " for all my websites

when trying to access webmail for all my websites i get the following error

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, root@localhost 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.

for some reason i need to use

https://webmail.mydomain.com:20000

i was not putting the “S” and the 20000

you can close ticket