I am linking Paypal to my website and it is asking for a 'client ID'. In Paypal I can see my "Merchant ID' and have put that number in the 'client ID' box. When I test out Paypal connect I get this message...
"Relying Party Validation error: client_id provided in the request does not match any of the registered clients. Please check the request."
Where do I locate the client ID number or is this message referring to something else?
