I'm not sure if i'm in the right place for my question but i still try (i'm really new in coding)

I bought this template http://ivang-design.com/hypnos/video-dark/ and i'm almost done with editing but i have a final issue with my portfolio / work section. 

When i deploy my version on a test adress ( https://floating-retreat-7474.herokuapp.com/) the projects pages wont open and bug pretty badly as you can see.

When inspecting the code with Chrome there seems to be a problem with jquery.js but couldnt figure out what to edit there.

Is it a coding problem or a deployment issue? 

If someone has any idea that could help i'd be very gratefull.

Thanks in advance