Guys, this was happening to me as of sun4apr25. I am pretty sure that this is just an ownership issue. Without needing to start the array, nor stop all the dockers, just go into your 'Libvirt storage location.' Which - in my case is "/mnt/user/system/libvirt/libvirt.img" - and change the ownership of the libvirt.img file to root. After doing that, you will be able stop - and start - the vm service and the error will go away. I repeated this by chowning it back to nobody and the problem happened again. Then chowned back to root. And it stopped. So, it is not just a 'one off.'