I think that you have a JQuery conflict in your theme. If you look at the source code line 186 you'll see this -
this version of JQuery is the one that's included in WordPress and most likely used by your WordPress seo plugin (which is correct). Your theme on the other hand is using an old JQuery version and calling it at line 10, so it's being overwritten later on.
If you deactivate all of the plugins, you might get the slider to work, but it would be best to rebuild the slider and make sure that it works with WordPress's built-in JQuery.