Errors

meta_yml_conforms_to_known_spec

License 'gplv3' is invalid (license) [Validation: 1.4]

valid_signature

Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Fri 31 Mar 2017 07:05:41 PM JST
gpg:                using DSA key F3DD7867BA53F93F
gpg: Can't check signature: No public key