Good day! I faced the same problem, but in my case these are links to download pdf books (
The test payment (classified as free) is going well. If a book without a price also gives out links to download, but when you need to pay .. goes to billing> the payment is removed> returns back to the cart, then I see the same message “Sorry, trouble retrieving payment receipt.”
The money has been withdrawn, links are duplicated to the mail .. but nothing happens on the site.
I added the Fondy payment gateway, there was no suitable one in your list of payment systems.
