Cart Orders not showing up

I am not getting any notification in Cart Orders when a product is sold on one of my pages.

This is a page with two items and five variants of each. The shopping cart pops up on the same page. Orders are going through to PayPal and money is taken. But I do not get a notification in the Cart Orders page.

A test page with only one item on it works fine.

Can anybody help?

https://www.ads-software.com/plugins/wordpress-simple-paypal-shopping-cart/