I am testing NVP SOAP API using the Sandbox. When I try to create a reference transaction via API (method POST .../nvp), I get the error:
"L_ERRORCODE0": "11451", "L_SHORTMESSAGE0": "Billing Agreement Id or transaction Id is not valid".
- Do I need to enable reference transactions on my sandbox business account? If so, how? I've searched the profile and cant find anything to set this.
- My sandbox business account is [removed]. PayPal Merchant ID AW94X5MFJB6SS
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