Subject: | Minimum required MIME::Base64 would be 3.11 |
As per subject. According to https://metacpan.org/changes/distribution/MIME-Base64 the function decode_base64url was introduced in 3.11
Sample fail report: http://www.cpantesters.org/cpan/report/3d3ecb1a-a0a5-11e3-8158-01ff8706f0e4
HTH && Thanks,
(Disclaimer: this was discovered by statistical analysis, I'm not speaking as a user)