Can not access nextcloud server

I try to go into my nextcloud server: and all I get is:
Internal Server Error

The server encountered an internal error and was unable to complete your request.
Please contact the server administrator if this error reappears multiple times, please include the technical details below in your report.
More details can be found in the server log.

This is being set up on a Univention Corporate Server. I have looked for any logs with information but so far not found anything.

Any help would be awesome, can not think what to look for.

Check the nextcloud.log file in you nextcloud’s data folder

Also refer to my post on similar issue here