Popup Pro + Mailchimp Embed Form - Nothing happens on submit

Hi! I was really excited about Popup Pro cause you can embed HTML forms, or so I thought.

Here's where you can see the issue: http://www.healthyhitsthespot.com/popup-tester-page/

Even if you don't fill in any info and you click the button, the little spinner just goes forever. If you do fill in info, it goes forever too.

Why won't it redirect? I found a couple other threads about this issue, but they all just hook up the support system and then close without any resolution.

I tried switching over from Wordpress AJAX to Footer HTML, but that didn't seem to do anything.

Please help!