Issue with SSL?

I’m wondering if there are any known issues with SSL sites and the Gravity Forms Placeholder Add-on. When I enable it on my site, I can’t scroll through my staff page. You can see how it works here:
https://communitycapitalny.org/about-ccny/staff/#

When I enable placeholders (for that Keep Informed signup at the bottom), the staff stays on the first name and will not scroll with the arrows or with the names on the left.

I love this plugin, but I need both to work. Any help you can give me is much appreciated.

https://www.ads-software.com/plugins/gravity-forms-placeholders/