Hi I have set up Express Checkout with c# asp.net mvc app. I have followed the instructions here https://www.c-sharpcorner.com/article/paypal-payment-gateway-integration-in-asp-net-mvc/ I get to the PayPal login screen (sandpit) and log in with my buyer account. It processes for a while and then errors on the payment.Execute() method error 400 Bad Request. Can someone please help me, I have no idea what is going wrong. Is there a log on the PayPal Sandpit server that I can view? Regards Davros66
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