Images appear as static

I just created my first parallax and it’s not working. The images are appearing one after the other (vertically) on my page – no parallax layering.

Any suggestions?

I’m using Vantage Theme by Site Origin.

http://bureau.langleyharper.com/

The image at the bottom of home page – brown dot, and 2 rings.

Thanks!

https://wordpress.org/plugins/image-parallax/