Sorry for necromancy, just leaving it here since this thread is first in google search results.
I've had the same issue, all other answers online were not helpful, until i stumbled upon this piece of information:
Code:
drath@BWN:~$ virsh
virsh # version
Compiled against library: libvirt 6.0.0
Using library: libvirt 6.0.0
Using API: QEMU 6.0.0
error: failed to get the hypervisor version
error: internal error: Cannot find suitable emulator for x86_64
so I ran
Code:
sudo apt install qemu-system-x86
and it resolved the issue.