I dual-boot (Windows 10 and Manjaro) with UEFI.
For some reason, /boot/efi was not able to mount during startup when booting into Manjaro.
I resolved this issue by restoring a previous snapshot using timeshift.
However, I was wondering why this was would happen.
I have a suspicion that when I installed steam-native and linux-steam-integration with dependencies on Pamac GUI, this caused an issue. I was told that a restart was needed after installing these packages but Pamac never updated the intramfs or updated grub.
I also noticed Windows had fast startup enabled so I disabled this before restoring the previous snapshot but /boot/efi was still unable to be mounted so I don’t think this was the issue.
After restoring the previous snapshot, I installed steam-native and linux-steam-integration with dependencies, updated inframfs, and updated grub. Everything booted normally.