If your prod.keys file is in a different location, you must provide the full or relative path to it. For example:
"Hactool prod.keys does not exist" is an error indicating that hactool—a utility for working with Nintendo Switch file formats—cannot locate the required prod.keys file containing title keys and other cryptographic keys. This prevents hactool from decrypting or parsing encrypted Switch content. This report describes causes, impact, detection, remediation, and recommended practices.
Then run: run_hactool game.xci