I get this as well trying to create a Google account from System Settings -> Online Accounts. Dialog title for me is 'Unable to finish -- System Settings' though, not Plasma. Latest Kubuntu 17.04 with all updates.
This is also reported over on KDE bugtracking: https://bugs.kde.org/show_bug.cgi?id=379270.
I get this as well trying to create a Google account from System Settings -> Online Accounts. Dialog title for me is 'Unable to finish -- System Settings' though, not Plasma. Latest Kubuntu 17.04 with all updates.
This is also reported over on KDE bugtracking: https:/ /bugs.kde. org/show_ bug.cgi? id=379270.