It seems that I have a jQuery issue on my site as App+

Hi,

It seems that I have a jQuery issue on my site as App+ doesnt really work.

http://ourlanguagecafe.com/book-lesson/?id=697

All needed shortcode is integrated.

It works in the buddypress theme but in my theme (child of twentythirteen) it doesn't.

Do you know how I can fix the problem?

Thanks,

David