Errors

meta_yml_conforms_to_known_spec

License 'gpl_2' is invalid (license) [Validation: 1.4]

valid_signature

gpg: Signature made Mon 11 Jul 2022 11:48:37 PM JST
gpg:                using RSA key FC2AB6F1E99D55AD0D1FD8FA03CF5677B9DCD6A2
gpg: requesting key 03CF5677B9DCD6A2 from hkp server keyserver.ubuntu.com
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==