I just installed Ubuntu 20.04 on a laptop. It had been previously running 18.04 (mostly) fine. After installing, it just stayed stuck on the GRUB menu and any time I tried to select Ubuntu it would just print that error a few times and return to the menu.
I tried boot repair two times with different options, all default on the first and secure boot disabled the second time. I have four partitions on /dev/nvme0n1
: an EFI partition, a swap partition, an unused ext4 partition, and my main partition.
I have the first and second boot repair outputs. I can't find any solutions online which fix the issue.