I have created a brand-new website using the Pro theme. The site has just one single page with one section. On that page I have placed one single element: a Revolution slider. The slider has just one slide.
When I try to edit that page the page/slider never finishes loading. What I see is the little wheel going around and around forever:

All software is up to date. I’m not getting any JavaScript errors. What could be the problem?
http://tap.videoperformance.video/