Hello, I am getting error code 10001 while using the sandbox reference transaction. Here below is the API code. POST /nvp HTTP/1.1 Host: api-3t.sandbox.paypal.com Cache-Control: no-cache Postman-Token: 5fd2cbde-f62f-8a94-20ce-fb0ab1479eb9 Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="USER" sb-z9tdg1681463_api1.business.example.com ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="PWD" 3KYDH8CWKVNHVFW6 ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="SIGNATURE" AMXeKPhw.z2xbnlq1HMRnQKMqyIOAeHBldvkPJ5OFyUVhxJZiuT-zmG0 ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="METHOD" SetExpressCheckout ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="VERSION" 86 ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="PAYMENTREQUEST_0_PAYMENTACTION" AUTHORIZATION ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="PAYMENTREQUEST_0_AMT" 0 ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="PAYMENTREQUEST_0_CURRENCYCODE" USD ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="L_BILLINGTYPE0" MerchantInitiatedBilling ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="L_BILLINGAGREEMENTDESCRIPTION0" ClubUsage ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="RETURNURL" https://www.teanada.com/en/ ------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="CANCELURL" https://www.teanada.com/en/ ------WebKitFormBoundary7MA4YWxkTrZu0gW-- This is the request code, copied from the postman. Can you please suggest what I am missing here? Thank you
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