I am using Ubuntu 18.04 with Unity 7.
Screenshot of problem
When I entered the credentials as shown in screenshot in settings (unity-control-center) and pressed enter, nothing happens. Is it related to missing of some gnome packages? I tried installing gnome-control-center and adding account from there, still no luck. I have gnome-online-accounts package installed. Is there something I am missing?
EDIT:
The problem seems to be with the UI. I tried doing the same thing with gnome-control-center, but still there is not button. Pressing enter does not work either