I tried to google that message and it found nothing. That's not good.
Makes me wonder what is causing that. Made me think a bit.
Have you double checked your fstab? Maybe you missed updating a line,
missed commenting something out or a typo maybe? Any strange kernel
options added to your bootloader? Typo maybe? Have you double checked
that the file systems you use for /boot and / are built into the kernel?
Hopefully someone else will have more ideas but in the meantime, may
want to double check those. Just to be sure.
Hope that helps, or someone else has ideas.