PayPal Checkout Add-On Not working

I am using the latest version of Gravity forms and the Gravity forms PayPal Checkout add-on. I need the form to work so that when someone registers for an upcoming event they can choose if they want a T-Shirt or not. If they choose yes then they are given a Product Field with a drop-down for them to choose their size and then they need to be able to use the form to input their card info and checkout.

No matter what I change or do I can not get the payment field to show up.

I’ve got a feed set up, I’ve got it set to live (NOT sandbox), and I’ve got the products in the form with pricing in each dropdown.

Please help, you can see the form here:
it is live, and filling the form out will result in a nonrefundable charge to your account.

Please see the following: