Hello,
You have several javascript problems on your site, which are causing the extension to break and problem other elements of the site. The first one that I see is that something on your site is calling an external jquery call:
<script src="
https://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js" type="text/javascript"></script>
<script src="/plugins/system/jqueryeasy/jquerynoconflict.js" type="text/javascript"></script>
Jquery should never be called outside of the core framework of Joomla, and that is what this script is doing. Jquery is called from the core so that is not called more than once on the page, which will cause conflicts.
You will need to disable all third party extensions and scripts on your site to see which one is interfering.