Hello Guys! I was trying to process a transaction and it is not working. i have the below error: Error #1. User authentication failed: 11452-Merchant not enabled for reference transactions. Please contact PayPal Merchant Technical Support (www.paypal.com/mts) and request `Recurring Billing` service, and also ask to have `Reference Transactions` enabled for Recurring Billing via Express Checkout. i had many other sucessful transactions, so what is wrong??
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