Trouble with WPbakery

Hi guys!

First, I would like to say sorry for my english. I try to describe my problem exactly.

I’am having a bit of problem. I bought the pro version and turn on the plugin.
It kills the wpbakery. If the plugin is turned on the back-end and front-end editor doesent working perfectly. I can’t edit the sections. The site always show a pop-up with “mirrorhajszalon.hu error” text.

If I turn off the plugin, everything goes perfectly.
Could somebody help me ?

The page I need help with: [log in to see the link]