Comment 10 for bug 1709818

I just encountered this on Focal/ARM64.

Applying https://gitlab.com/libvirt/libvirt/-/commit/2b98d5d91d95087d8a96d6450fa96414ed05ba5c and restarting the services fixed the issue:

systemctl reload apparmor.service; systemctl restart libvirtd

ii libvirt-clients 6.0.0-0ubuntu8.16 arm64 Programs for the libvirt library
ii libvirt-daemon 6.0.0-0ubuntu8.16 arm64 Virtualization daemon
ii libvirt-daemon-driver-qemu 6.0.0-0ubuntu8.16 arm64 Virtualization daemon QEMU connection driver
ii libvirt-daemon-driver-storage-rbd 6.0.0-0ubuntu8.16 arm64 Virtualization daemon RBD storage driver
ii libvirt-daemon-system 6.0.0-0ubuntu8.16 arm64 Libvirt daemon configuration files
ii libvirt-daemon-system-systemd 6.0.0-0ubuntu8.16 arm64 Libvirt daemon configuration files (systemd)
ii libvirt0:arm64 6.0.0-0ubuntu8.16 arm64 library for interfacing with different virtualization systems