Thumbs not showing

Hi there. I have set up an installation, and the thumbs are not showing. You can click on the image ok and get a large version. But no thumbs. This is the link:

https://speedmaster.iamkieran.com/blog/

I have set it up exactly the same as here which works fine.

https://www.motionltd.com/random-gallery/

Any help would be great, thanks.

Ben

https://www.ads-software.com/extend/plugins/alpine-photo-tile-for-instagram/