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 a README to the distribution. It should contain a quick description of your module and how to install it.
Add a META.yml to the distribution. Your buildtool should be able to autogenerate it.
Add a Changelog (best named 'Changes') to the distribution. It should list at least major changes implemented in newer versions.
Add tests!
Make sure that the main module name and version are the same of the distribution.
Remove the POD errors. You can check for POD errors automatically by including Test::Pod to your test suite.
Error: graph-modules-1.001/Graph/Node.pm -- Around line 88: =over should be: '=over' or '=over positive_number' Around line 108: You forgot a '=back' before '=head2'
Add a META.json to the distribution. Your buildtool should be able to autogenerate it.
Add tests or move tests.pl to the t/ directory!
Move your *.pm files in a directory named 'lib'. The directory structure should look like 'lib/Your/Module.pm' for a module named 'Your::Module'. If you need to provide additional files, e.g. for testing, that should not be considered for Kwalitee, then you should look at the 'provides' map in META.yml to limit the files scanned; or use the 'no_index' map to exclude parts of the distribution.
Error: Graph/Edge.pm, Graph/Element.pm, Graph/Node.pm
Define the license if you are using in Build.PL. If you are using MakeMaker (Makefile.PL) you should upgrade to ExtUtils::MakeMaker version 6.31.
Add 'use warnings' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.
Error: Graph::Edge, Graph::Element, Graph::Node
This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.
Add SECURITY(.pod|md). See Software::Security::Policy.
Add SECURITY(.pod|md) and add a contact address. See Software::Security::Policy.
Add CONTRIBUTING(.pod|md). See https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/setting-guidelines-for-repository-contributors.