When you see this error, you are likely trying to "launch" a file that contains only an update or DLC, rather than the base game. 2. Primary Fixes for Emulators (Yuzu, Ryujinx, EmuDeck) A. Separating Updates and DLCs One of the most common causes is using a tool like Steam ROM Manager
The error message "The NSP file is missing a Program-type NCA" the nsp file is missing a programtype nca fix