Using Firefox and Chrome (latest versions).
I can put items into my cart, I can get the button 1 (items), 2 (payment method) to go green. But when I push the big red button to Place Order the site won't process the order. It'll show a site processing spinning wheel briefly but the order never gets placed. The website changes and stops displaying the tabs (1,2,3) when you click the Place Order button the first time.
I've also deleted cookies and the website cache, but no dice, still fails to place the order.
Items were all digital products (Beginner box and Lost Omens: Pathfinder Society)
Emptying the cart and re-adding the items resolved this issue. Which is confounding...
This worked for me as well. I should have thought of trying it on Monday, but I guess I lose out on the discounts. Hopefully customer service will be able to credit me back the discount.