Hello, I am testing NVP SOAP API using the Sandbox. I have created an account in developer.paypal.com and then the NVP SOAP. When I try to create a reference transaction via API (method POST .../nvp), I get error: "L_ERRORCODE0": "11451", "L_SHORTMESSAGE0": "Billing Agreement Id or transaction Id is not valid". When I looked in docs, I found out that I have to first set the Billing Agreement Id via UI, but I don't see anything there. May you please help me? Any help is highly appreciated! Intybot
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