Most probably CPANTS databases are being regenerated from scratch due to major changes in Kwalitee metrics or updates of relevant modules/perl. Usually this maintenance takes about a day or two, and some of the information may be old or missing tentatively. Sorry for the inconvenience.
Add =head1 LICENSE and the text of the license to the main module in your code.
Run a proper command ("make manifest" or "./Build manifest", maybe with a force option), or use a distribution builder to generate the MANIFEST. Or update MANIFEST manually.
Error:
Remove the POD errors. You can check for POD errors automatically by including Test::Pod to your test suite.
Error: HTTP-Caching-0.12/lib/HTTP/Caching.pm -- Around line 142: Unknown directive: =head
Add =head1 LICENSE and/or the proper text of the well-known license to the main module in your code.
Add all modules contained in this distribution to the META.yml field 'provides'. Module::Build or Dist::Zilla::Plugin::MetaProvides do this automatically for you.