Hittin Enter, or TAB+Enter should work. It isn't u-c-c bug. The issue is in gnome-online-accounts. For unity, you can run with
GTK_CSD=1 unity-control-center ** Also affects: gnome-online-accounts (Ubuntu) Importance: Undecided Status: New ** Changed in: unity-control-center (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1868732 Title: Single Sign-on dialogue has no [OK] button To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-online-accounts/+bug/1868732/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs