I’ve just installed a Nextcloud server on Ubuntu using the snap (which may not have been a smart move) and despite the settings showing a green tick beside Collabora online server is reachable, every time I try and open an xls or doc file, I get a spinning wheel followed by Failed to Load Collabora online.
Unfortunately no I haven’t. I have another thread running on this now as I tried running Collabora in a docker container to try and external version, but no joy their either I’m afraid.