Hi, I have been trying to test my paypal payment integration using php sdk but after redirecting from paypal payment page to my side, i get internal server error. What could be causing this? And how do i solve the problem? Request details: Endpoint: https://api.sandbox.paypal.com/v1/payments/payment/{paymentId}/execute Auth: Authorization Bearer {generatedAccessToken} Accept: application/json Body: payer_id -> {generated payerID parameter} Thank you.
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