Just tried to start my virtual machine and got this odd error:
Error starting domain: Failed to connect socket to '/var/run/libvirt/virtlogd-sock': No such file or Directory
I have no idea where it came from, since I haven't used my virtual machine for a month. In any case, the solution was very simple:
$ systemctl start virtlogd.socket
And then restart the virtual machine manager.
Now it works: