Errors

meta_yml_conforms_to_known_spec

License 'gplv2' 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 Tue 07 Jun 2016 04:16:33 PM JST
gpg:                using RSA key 91ECE8DBCAC5C305
gpg: Can't check signature: No public key