Add a META.yml to the distribution. Your buildtool should be able to autogenerate it.
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.
This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.
|Sys::Dev::LDAP::Populate||Populates various parts of /dev/ldap.||0.001001||metacpan|