As user Goron Kent indicated:
There's a minor bug in the Perl documentation in which
some classes that aren't exposed to Perl are linked to
( Which results in a 404 page not found, since those
docs shouldn't be exposed ).
- Page with problematic link
- Broken link found on page
With the help of Marvin, we've created a patch for the Perl docs that will
still generate the class name, but only link to classes if they're exposed
to Perl and can be viewed.