I put a donate button in my article, and the button shows up fine. However, clicking on this button renders this error in PayPal:
We cannot process this transaction because there is a problem with the PayPal email address supplied by the seller. Please contact the seller to resolve the problem. If this payment is for an eBay listing, you can contact the seller via the "Ask Seller a Question" link on the listing page. When you have the correct email address, payment can be made at http://www.paypal.com.
I thought this might be because I have a Premier account and not a Business level account, so I upgraded it in PayPal. However, I am still getting this error...


