I get an error message when creating or editing:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
can someone tell me where in which log I can look to see what the problem is?
Hi @trainico
To try to help, we need to provide more information. You should give us information that appears in the LOGs.
To do this, access via SSH via WINSCP (if you are using Microsoft, if you use Linux, you must use another tool) and provide us with the errors that appear in / var / log.
For example, the errors that appear in:
And some more file that I don’t remember now.
We wait news from you.
Greetings.
The problem has been solved. The rights on the ovpn folder were not set correctly. I copied the configuration and the ovpn users from an old installation. Obviously write permissions were missing.
Sorry, my english is only available from Deepl 
Thanks for your help!