Uncaught ReferenceError: embedVars is not defined on Disqus

I just recently switch to Disqus, from generic WordPress commenting. I imported all my old comments to Disqus. now I am getting the following error “Uncaught ReferenceError: embedVars is not defined” …/wp-content/plugins/disqus-comment-system/media/js/disqus.js?ver=4.2.2 “var disqus_url = embedVars.disqusUrl;” . its a live site please check http://www.khabza.com

https://wordpress.org/plugins/disqus-comment-system/