This error typically triggers on Nintendo Switch emulators (like Ryujinx or legacy setups) or manager tools (like EmuDeck/Steam ROM Manager). It means the file you are attempting to launch is either a standalone update/DLC file (which doesn't contain the core game executable) or the file transfer was incomplete.
are outdated, the installation tool may fail to decrypt and "see" the ProgramType NCA inside the package. Incompatible Homebrew Tools the nsp file is missing a programtype nca fixed
: Verify that the file you are trying to run is the base game NSP, not just an update or DLC. If using This error typically triggers on Nintendo Switch emulators