I know, it’s only just arrived - but will there be a version of working2gether for NC12 soon?
I think this is now available with version 0.9.4 
Please report back, whether this is working 
https://apps.nextcloud.com/apps/workin2gether
Greetings
Marius
It is. Installed and working on 2 NC12 instances so far (1 single server, other split in 3 (4 if you count storage server!).