Help a little lost...

Ps5 slim with disc

Firmware 6.02

So I followed modded warfare's guide for Y2JB

I used his Y2JB-autoloader-etahen2.3b

It loads the payloads including shadowmount, I put a game on a usb drive usb/homebrew/game

Shadowmount detects the game, but when I click it I get "can't start game or app"

Also itemzflow doesn't see the game so I can't copy it to internal storage.

Where am I going wrong?

Have more questions but this will do for starters...