While not foolproof, standard prod.keys files are usually very small (typically between ). If your file is 0 bytes or several megabytes, it is definitely incorrect or corrupted. 2. Match the Firmware Version

The file must be named exactly prod.keys (no .txt at the end).

C:\Users\[YourName]\AppData\Roaming\Ryujinx\system Summary Checklist To ensure your keys are correct, verify these three things: