[Plugin: Envira Gallery] Lightbox not working

Hello,

So first of all I’m a novice in dev.

That said, I got a problem with my Envira gallery: the lightbox isn’t working. My pictures open in a new tab. And obviously I have no idea how to resolve this. Anybody can help me please?

It was working fine with my former theme, and now it doesn’t work with my new one.

You can see the problem here: http://www.kinzee.fr/2014/07/test-monsters-ate-my-birthday-cake/

Also everything is up-to-date.

Thank you very much