I have an OL8 system with a btrfs rootfs. I ran a dnf upgrade this morning and on reboot I just got a grub> prompt. If I ran insmod btrfs I was told that btrfs.mod could not be found.
I booted off the UEK media and downgraded grub2 to 2.02-123.0.3 in a chroot shell. After this I could successfully boot the system.
Is the btrfs module missing in the 2.02-123.0.4 release or did my upgrade just have a hiccup?