Error: Read More button trying to add unspecified amount to basket

?As you can see from your own demo, when selecting the “Read More” button on the products page, the page displays an error:?

Please enter a valid donation amount.??

It is trying to add the item to the basket when no donation amount has been set.
On my own site, I’ve had to hide the product from the catalogue/search to avoid this problem.
The “Read More” link needs to be updated to take the user to the product detail page.

Thanks

PS – this is a nice plugin though.