: You are attempting to boot a standalone game update or DLC file instead of the actual base game.
Some installers like Tinfoil allow you to queue multiple files. Always ensure "Base Game" is at the top of the queue before updates. the nsp file is missing a programtype nca fix
Navigate to your main Switch ROM directory (e.g., Emudeck/roms/switch/ ). : You are attempting to boot a standalone
Some installers are stricter than others. the nsp file is missing a programtype nca fix