a long time ago this was the kind of stuff a WIN update would do to solus. derail Network Manager. never dual booted again. WIN ssd is under the bed.
I digress.
sudo systemctl status nmb.service
from there. you can start/restart etc.
I have no idea what a .vice file is I think you copied/pasted incompletely there
I am no expert at all because in systemctl there are like 4-5 ways to restart a service.
Just try start and reboot.
If it holds you know you fixed it.
If it doesn't then we have to find out what has suddenly out of the blue disabled networkmanager.service and nmb.service
hope this is a place to start troubleshooting