Which or specific GUI frontend are you running?
The "hactool prod.keys does not exist" message is rarely a showstopper. By understanding it as a [WARN] notification rather than a critical error, you can confidently use --disablekeywarns to suppress it or one of the two primary methods—using the -k parameter or placing the file in ~/.switch/ —to resolve it for good. hactool prod.keys does not exist
The prod.keys file is a plain-text file containing cryptographic keys unique to the Nintendo Switch console. These keys include: Which or specific GUI frontend are you running