I could not find an answer to this exact behaviour yet. I am a long time user of NC, using a shared hosting Provider. Yesterday I went up from NC 17.0.3 to NC 18.0.0 and also installed the OnlyOffice and DocumentServer Apps.
When I use the + to create a new Table for example, the file itself is created, OnlyOffice loads up (i see the whole OnlyOffice GUI after a few seconds) and then in the middle of the screen a loading circle keeps spinning and telling me that it is loading the file now. But it never tops and it sits there for an hour+ until I close the browser tab.
For further testing, on the same platform, I did a fresh install of NC18 with all my Apps, to get the same installation like I have it now. The only difference is, that my “production” installation was upgraded along the way and the test installation is a fresh one. On the fresh one it works flawless.
I think there is something in the old installation that makes problems, but I cannot figure it out. Using the Browser Debug Console, I can not see any error messages. And since it is a shared hoster, I cannot access any logs on the “linux machine”.
I always upgrade manually by removing anything but the config and data folders. So it has to be something either in one of those folders or within the database I can´t figure out.
Any ideas what I can look for in my case?
Any help is appreciated very much