Zorin OS 16 Core cannot install boot EFI

Am also having same problem. It's saying can't find "Boot/EFI". Even though it boots to live cd in legacy mode(Even booted on other old computers that used legacy mode). Could this be a problem of directory naming or theres something else at play?
I installed Zorin 15.3 with no issues unless Zorin 16 uses a different installation process.

Aside from rEFInd you are exploring here:

Can you try: