I can confirm that the problem still occurs with gnome-boxes 44.1-1ubuntu3 amd64.
The console prints Boxes-WARNING **: 22:36:50.780: util-app.vala:442: Failed to execute: virsh capabilities
I can confirm that the problem still occurs with gnome-boxes 44.1-1ubuntu3 amd64.
The console prints
Boxes-WARNING **: 22:36:50.780: util-app.vala:442: Failed to execute: virsh capabilities