Thanks for reporting this bug.
Please show the results of
sudo systemctl status libvirt-bin.service and sudo journalctl -xe
and attach the file /etc/libvirt/qemu/networks/default.xml
Thanks for reporting this bug.
Please show the results of
sudo systemctl status libvirt-bin.service
and
sudo journalctl -xe
and attach the file /etc/libvirt/ qemu/networks/ default. xml