I am trying to test PayPal Express Checkout in Sandbox, but it shows a message below after logging in. "We aren't able to process your payment using your PayPal account at this time. Please go back to merchant and try using a different payment method." https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&useraction=commit&token=EC-12B58334VA700982R#genericError The scripts worked until last month, so it might be caused by SSL Certigicate Upgrade, but not even sure about this. Anyone knows where to look at? Thanks
... View more