Can't get Add To Cart button to work on product with variants

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Hoping someone can help me with this specific feature which I haven't been able to find a similar post on.

I'm using the Envy theme and on this customized collection page (which hasn't changed much except for the layout), I can't seem to get the add to cart JS to work just on the products with variants (all the products beyond the first row) like the way it works on the two products on the first row.
Password: bdb2020

I simply want the "Add To Cart" to work without leaving the page.  What am I missing?  I know it has to do with the json data (I could be wrong) but I can't seem to figure it out.  Is it not possible?

Thanks for any help.