Another option is to run omv-firstaid from the cli and select option 2
I used omv-firstaid and did option 2.
So I did this:
I set HTTP to Port 81
I set HTTPS to Port 443
I am using Google Chrome, but I think it is again the server not letting me use TLS/SSL, which is also why I can't fully install and use NextCloud-LetsEncrypt. This is the fundamental issue here.
Any thoughts why it is doing this?