Why did I get API error code 11502?
PayPal returned API error code 11502 - The token is missing or is invalid.
Cause
One or more subscription detail fields are missing from the request.
Solution
Verify that your token is valid and being passed correctly in your API request.
Note: See the Developer Portal for a complete list of NVP/SOAP API error codes.
See also:PayPal Express Checkout Integration