I am using Ubuntu 13.04. I am trying to setup online accounts, i.e. google+. I click on google and the login window for google+ then shows up. However after a few seconds it reverts to the add account window.
How do I fix this?
Try installing gnome-online-accounts:
sudo apt-get install gnome-online-accounts
I had the same problem, and doing this it worked.
(I got this clue on this old bug: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/869341)