Eternalrest

In JSFiddle, what I have built works like a charm(timeline with boxes that fade in from left/right). This was copied from a previous website I Have created and it worked perfect there as well. However, for some reason on another website it simply won't work. The error thrown is the overwrite error and I simply can't understand why it won't work considering it's literally the same. Done with ScrollMagic, GSAP, jQuery. https://goo.gl/JeUiEE