You are running Nextcloud.
You installed Collabora Office (or Nextcloud Office?).
Which one?
We have several self hosted NextCloud servers
On those servers the app, Nextcloud Office 8.2.3, is installed and configured to connect to the Collabora server ie https://domain.com:9980/
You can get to /browser/dist/admin/admin.html successfully, but can’t open documents.
Before I access /browser/dist/admin/admin.html, documents won’t open. After I login with the admin credentials, the documents open and can be edited again.
QUESTION #1: Did you follow any installation instructions? Can you link them here?
QUESTION #2: Can you tell which exact error appeared?
Unfortunately I did not document the errors, total oversight on my part. They were along the lines of “Failed to load document” and “reverse proxy”
Thank you for the troubleshooting link, I will have a read through