There is no dropdown -- the entire page is display above, with some names changed to protect the innocent. However, I am not dealing withe latest versions of everything, so I've used no warnings to keep things quiet -- for now -- and next week I will attempt (this is a new work machine) to update the necessary Perl modules.

If I can produce a working example that still causes an error, I'll report it on CPAN. I can't understand it either -- it's very puzzling.