Collabora cURL error 28 - built in Collabora CODE not working

Thank you! But I have great difficulties understanding that guide because it leaves a lot out and I do not understand how to do many of the things there.

Mainly, I do not understand “client” and “console” in the troubleshooting part. I do get a file, but seems to be HTML instead of an XML file. I do not really know what to look for when it comes to “public hostname” or “right… URL scheme”. This is here:

Then it goes on to tell me to install the richdocuments app. I thought that was done in installation when I checked the box to include Nextcloud office.

The tip about curl -v was really helpful. It seems port 443 is used and since it is already open I think I do not have a port forwarding problem.

I am learning but I am not as well versed in all the lingo and what it means as the rest of you.

Thanks for any help!