Michael Catanzaro authored Aug 23, 2023 and Matthias Clasen committed Aug 24, 2023

It's expected that gtk_widget_get_root() will return NULL if the widget
tree does not contain a root widget. I don't know what that means or why
it happens, but it's true in gnome-control-center's network panel when
displaying the OpenVPN configuration dialog. We need to handle it.

Fixes #6056