Fancybox showing blank white box in Spirit / Upfront

Hello,

We're trying to use Fancybox for our images, but it just pops up a blank white box when we try to use it. When we attach an image and save it in Upfront, it does the same thing on the front end of Spirit. This has been an ongoing issue and we'd like it resolved so we can use the Fancybox feature in Upfront / Spirit.