"grub_is_Shim_lock_enabled not found"

Hi again. I’m struggling to carry out the guidance on the Arch Wiki, under the “Default/fallback boot path” section.

It suggests the following 2 commands:

mv esp/EFI/grub esp/EFI/BOOT
mv esp/EFI/BOOT/grubx64.efi esp/EFI/BOOT/BOOTX64.EFI

I don’t think I’m defining the fallback boot path correctly. How do I find this out, for my machine?

I’m hoping I can fix this & avoid re-installing Manjaro. I appreciate any assistance forthcoming.

Thanks, Ruziel