responsive lightbox plugin my theme dont work correctly

hi,

i’m using the plugin responive lightbox and I actually tried some other lightbox plugins with the theme Flamingo. They all do the same, open a picture for a second correctly and than just show the picture in the browser. you can check this on:

https://schwanstyling.com/wp/portfolio/serie-b/

I’m not familiar with javascript & co. where is the problem?

thx

john