Image Gallery error

Hi!

A few days ago, our image galleries stop showing the images on a pop-up and now, when you click on an little image, it opens separatedly. I’ve been checking the galleries options, the carousel on Jetpack… But everything seems to be fine.

Here is an example of what’s happening: http://www.fantasticplasticmag.com/fantastic-spot-los-jueves-tartaros-de-acontraluz/

Do someone know how to fix that, please?

Thanks for all! Best,

Raül