I was running on 5.4 and tried to get my bluetooth to work. So I tried all of the possible kernels up from 5.4 and installed all of them. Tested them and none worked, i was on kernel 5.9 (experimental) and then i uninstalled all of them except 5.4. I was running 5.9 when i uninstalled it. Then i restarted and after selecting manjaro in grub menu i got this error
Failed to start: Load Kernel Modules
Failed to mount /boot/efi
Dependency Failed for local File system
After that I followed this GRUB/Restore the GRUB Bootloader - Manjaro Linux
And I still have the same problem.
EDIT: now grub goes instantly into rescue mode aswell
error symbol grub calloc not found