Hi, out of no where when I boot into my tumbleweed installation (secure boot, uefi), it goes straight to grub rescue, no error messages.

I've tried to follow this guide here: https://doc.opensuse.org/documentation/leap/archive/15.1/startup/html/book.opensuse.startup/cha-trouble.html#sec-trouble-data-recover-rescue-access

However, first of all when I boot into a live cd in rescue mode and login as root, it doesn't find the command "rootvgimport".

Fair enough, continuing the guide and running lsblk shows my lvm installation, but I'm not able to mount it.

When I run "mount /dev/sdc /mnt" it says it cannot mount because it's busy or already mounted (it's not mounted by me anyway).

If I try "mount /dev/sdc2 /mnt" it says unknown filesystem LVM_Member.

Running "mount /dev/sdc2/system-root /mnt" doesn't work either.

Any ideas?