When booting, it suddenly just goes to (initramfs). NOTE this will reset the VM ie you lose everything on it. I didn't research yet a way to just recover without losing data.

1. type blkid ... and look for something that has ext4 (ie looks like a filesystem)
2. fsck /dev/sda1 -y (modify this for your disk path ... this should check and fix the corrupt partition
3. reboot -f