I just installed the new version on a test server following Alvaro's instruction (without Coturn and Letsencrypt) on Ubuntu 20.04. I had the version M4 running before with much less issues.
1. First thing that annoyed me was the fact that I cannot restore the USERS and FILES tab once removed the to the right. 2. The FILES tab shows folders with moving errors only. I suppose this signals some failure. Upload is impossible too. Though I can see the file in the folder, an exclamation mark signals some error, and I cannot drag it on to the whiteboard. I suppose the reason is some problem with permissions. I set the whole OM folder to chown -R nobody:nogroup ./OM-Folder But nothing changed. Best K.