When you see the error , it means the program cannot find the encryption keys required to decrypt Switch files .
Rename the file if necessary. Do not add any extra extensions. hactool prodkeys does not exist
: If your prod.keys are from an older firmware (e.g., firmware 10.0) and you are trying to decrypt a game that requires firmware 19.0, hactool will fail because the specific "Master Key" needed for that newer game is missing from your file . hactool prodkeys does not exist