[Plugin: Shadowbox-JS] not working – image links to page

I am having trouble getting the shadowbox-js plugin to work.

I had it install on my test site, and it worked beautifully. After setting it up on the actual domain, the images just link to another page.

I am using this in conjunction with Sharpfolio theme. I have thoroughly checked through all the template files, css, and plug-in settings and everything seems to be identical to the working version.

The site where it’s not working is:
https://dawnlangstrothlaboratories.com/

Please help!