I used advanced recovery mode to fsck my Ubuntu 24.04 instance due to filesystem checks on every boot.

I used the 'fsck' option from the menu and received the error:

/lib/recovery-mode/recovery-menu: line 80: /etc/default/rcs: No such file or directory.
fsck from util-linux 2.39.3
/dev/nvme0n1p5 is mounted
e2fsck: Cannot continue, aborting.

/dev/nvme0n1p5 is the mount point for /, /var/snap/...
/dev/nvme0n1p6 is the mount point for /home

I re-tried the same method this time using 'root access', separately, on each of the nvme's but received the same message each time.

Help?