| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | “NSP is missing a ticket” | The file is unsigned or incomplete | Find a different source or use a ticket-generator like sigpatches | | “Failed to install – Invalid NSP” | Corrupted download or fake file | Re-extract the .rar ; re-download if needed | | “Game loads to black screen” | Missing firmware or keys (emulator) | Update your emulator’s prod.keys to the latest version |