I am trying to understand how the user groups work.
I thought if I assign users to groups the functions would be restricted to this groups.
Like the group friends can only see and share things to other users in the friends group.
But the friends group cannot see nor share anything to the family group.
Users who are both in friends and family group can see and share everything to users in both groups.
With see I mean the little user button where every user in the nextcloud instance is shown or if I try to share something all users automatically pop up.
Check Restrict users to only share with users in their groups to confine sharing within group memberships.
Check Exclude groups from sharing to prevent members of specific groups from creating any file shares in those groups. When you check this, you’ll get a dropdown list of all your groups to choose from. Members of excluded groups can still receive shares, but not create any
Check Allow username autocompletion in share dialog to enable auto-completion of Nextcloud usernames.
@STrike Thanks wrong sharing button was the answer.
But I learned about two apps from app store which is good too.
After some testing Circles and Groupfolders are very powerful so I am quite satisfied with the options.
Although I could not solve the blank Sharing page yet, but thats not important for now.
Just an idea about your empty sharing page: did you disable the app “Federation”? I believe that app is providing the data for that page as it only shows information regarding your own federation idea and informs you that you can share with users from other servers:
