@Billie yet it is disabled by default after updating nextcloud, which is a terrible user experience... wasnt this some kind of a core app?!

@milan

enable it. :-) Nextcloud is not famous for smooth updates 😕

Every 3-4 updates, I have to fix something from the console, the worst thing was one time I even had to insert some rows manually from the sql console....

@milan
Had this as well. The app for Shared Ressources was disabled after an Upgrade because it was "not compatible". As @Billie says, just enable it.
My user got angry as the shopping list was not available anymore 😂