Mobile menu doesnt work in Encephalon theme

Hello!

I downloaded demo version of Encephalon theme and instaled here
http://wwwbg.eu/demo/

Mobile menu in my install doesn't work - but in your demo everythink is fine.

What may be cause the problem?

How can I fix that?

Wp version is 3.9.6 - in your demo is 3.3.1

working plugins here

There was conflict with
https://wordpress.org/plugins/addon-so-widgets-bundle/

Plugin is very usefull, but there is conflict - jquery, I think.

When is off - menu is working.