Flexslider JS not Loading
I see in your page source it says:

http://www.athleteyouniversity.com/sites/all/themes/nexus/sites/all/libraries/galleria/plugins/history/galleria.history.min.js?o30qzc


You have a sites/all/ folder inside your theme /nexus folder, which is not how it's suppose to be. The libraries folder needs to be outside of your theme folder.

It's suppose to be /sites/all/libraries/galleria/plugins/history/galleria.history.min.js