I've set up a web site and acted as a test user to see if Paypal worked, however after hitting the Paypal button I see this: "Return to Merchant 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. When you have the correct email address, payment can be made at www.paypal.com." Can someone explain what this means and what I can do to remedy it? Thanks
Did you check your email address? You might need to sign into your Paypal account and verify your email address. PayPal Dev might help as well.