I can confirm this behavior. I'm using Ubuntu Mate 18.04 and some Gnome utilities like gnome-calendar or gnome-weather. In gnome-calendar I wanted to add a Google account, but there's no way do do it, because it opens the gnome-control-center and shows a blank window.
** Attachment added: "Blank window of gnome-control-center" https://bugs.launchpad.net/ubuntu/+source/xubuntu-meta/+bug/1754872/+attachment/5075657/+files/empty_control_center.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1754872 Title: gnome-control-center is unusable on xubuntu-desktop, but called from Gear (About this Computer, System Settings) icon, Text Entry Settings, clock (Time & Date Settings) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xubuntu-meta/+bug/1754872/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs