Fancy Box wont work with new gallery

We have been creating galleries with the regular plug in for
months now on many member pages and they all work.
They all used Fancy Box for display.
Here is an example of the slideshow working fine.
https://www.unitedfireplaceandstove.com/kingsley-pa-scranton-pa-binghamton-ny/

Now all of a sudden, the gallery no longer opens in a viewer
it just opens a link to a page on a new slideshow we created.

Here is an example of the new slideshow not behaving correctly,
it appears not to be getting the fancy box display for some reason.
https://www.unitedfireplaceandstove.com/carmel-ny-putnam-valley-ny/

If I use another gallery’s id on the above page it will work. In fact we just created a gallery last week for another page and it works fine.

https://www.ads-software.com/plugins/nextgen-gallery/