online-accounts: Google prompt is empty
On Fedora 29 it is not possible to add Google online account, because an empty window is opened:
$ rpm -q gnome-control-center
gnome-control-center-3.30.2-1.fc29.x86_64
This maybe relates to #73 (closed), but in this case, this happens on real hardware.
I am on Wayland session if it is relevant.