There is an ongoing outage on the primary CPAN mirror. It is possible to work around the issue by using MetaCPAN as a mirror.

0.33
  - Fix documentation to refer to the Authen::NTLM::HTTP::Base module so
    that 'Authen::NTLM' isn't claimed by the PAUSE indexer.
0.32
   - Rename Authen::NTLM to Authen::NTLM::HTTP::Base to avoid namespace clash