I upgraded to Kubuntu 22.04 LTS but boots only when my external drive is plugged in. Why?

I just upgraded my machine from 20.04 to 22.04.Everything works, except for this strange behavior.

I have this external HDD which contains just backup of my computer, but it needs to remain plugged in while booting. If I remove it, my laptop doesn't boot. No it doesn't have any partition or anything to boot.

This is how my fstab looks like:

john@john-EON15-X:~$ cat /etc/fstabUUID=xx3657a9-xx89-xx5c-xxf4-xx1ac457550c   /                           ext4    errors=remount-ro   0 1 !# /boot/efi was on /dev/nvme0n1p1 during installationUUID=xx7B-xxF8                              /boot/efi                   vfat    umask=0077          0 1 /swapfile                                   none                        swap    sw                  0 0 /dev/sdb1                                   /media/john/TMC-SoundRoom   exfat   defaults            0 0 

The "TMC-SoundRoom" is my external hdd. If I remove (ofcourse safely remove it) it reboots, and I get this error

And another strange thing, except "enter" key, I cant type anything else.I have to do a hard boot on the machine.