Enroll Now Button is hanging on CoursePress

I've noticed that on more than one site on our network - registrations tend to hang when a user clicks on the "enroll now" button. It just grays out. After we refresh - it seems the action sometimes takes.

You can try it here :
http://kandiswebb.coachsites.me/all-courses/
http://ebcorner.coachsites.me/courses/the-opt-in-process-101/

In both cases it's doing the same thing.

Is there something I'm missing?

Support Access is on.