Slides not changing – Portafolio theme

My website used to have a bunch of slides that shuffled through every few seconds when the homepage loaded up. http://www.fadedclothingco.com
But now for some reason it shuffles through all of the slides in a few miliseconds then freezes on the last slide and doesn’t change. I haven’t changed any settings so I’m not sure what the deal is.
My theme is Portafolio.