The error message "[WARN] prod.keys does not exist" in hactool is a common notification that often indicates the tool cannot locate your production keys file or is looking for a file with a different name. Key Solutions to the Error
Further investigation into prodkey generation issues to prevent corrupted or invalid files.
Development of more user-friendly tools for managing prodkey files and hactool configuration.
For prod.keys, ensure entries include required keys for your target (e.g., "prodkey: ..." or the format your hactool build expects). If hactool complains about missing specific keys, add those lines as needed.