Lightbox not working

Hello

I really like this plugin and I want to purchase a full version, but currently I am testing it and I am having a problem with lightbox not working. When I click on an image, it just loads the image without light box.

Here is a link to the website.
http://dyi.li/4IK

I appreciate any help

Thanks

https://ww.wp.xz.cn/plugins/easy-media-gallery/