When trying to Add group from the Users section, the URL points to https://example.com/settings/users# and of course nothing works. The Add group dialog doesn’t come up, or anything.
Why is this link broke?
Where to fix it?
This is a brand new install of Nextcloud 22.0.0
removed your url. example.com should still be helpful. 
Are you talking about creating a group, or creating a circle from the contacts page?
This will be fixed with NC22.0.1
I have been having the same problem. Glad to know that it has not something caused by my config.
@just in my case it is creating a group.
For now I add groups by editing a users “Groups” column, listing groups that are not there and then saving it. After that I remove the group from the user.