If your prod.keys or title.keys are old, the emulator might fail to decrypt and identify the Program NCA within the container.
Open your emulator (Yuzu or Ryujinx) first, and then manually select and launch the game from the internal list. Summary Checklist Potential Issue Recommended Action Wrong File the nsp file is missing a program type nca
If the NSP was incorrectly dumped or downloaded in parts, it might be missing data. If your prod