Once you’ve applied the fix, follow these best practices to avoid seeing "The NSP file is missing a ProgramType NCA" again:
: If the issue persists even with the base game, the NSP file might be corrupted. Try redownloading the file or using a tool like NSCBuilder to verify its contents. the nsp file is missing a programtype nca fix
Some users report that the error is specific to the NSP format on certain installer versions. Converting the file can bypass the error. Fixing the "NSP File is Missing a ProgramType