I might be experiencing same/similar bug on a fresh install of 20.04. I don't have a Yubikey. Or at least I don't think I do :).
In my case the bug is triggered when I try to open a folder needing root permissions. Sometimes I get an auth dialog and it let's me browse the folder. More often I just get a spinning wheel and nothing happens... or so I think, until I lock my computer. Upon unlocking it, I get a stuck auth window, which is not entirely unlike the one OP is getting (see screen shot attached). There is no way to get rid of the window, other than reload gnome-shell. (Thanks polalbert!) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1824874 Title: undismissable, unclickable authentication dialog left on screen (top- left corner) after policykit authentication [pushModal: invocation of begin_modal failed] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1824874/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
