Pop Up! not functioning properly

http://dollarstoredeal.com/test2/

It won't allow me to close the pop-up using the "X" button and it isn't scrolling with the browser window. I'm looking at the dev console and it's throwing this error:

Failed to load resource http://dollarstoredeal.com/test2/wp-content/plugins/popover/popoverincludes/js/public.js?ver=3.5.2