Failure in call to Pay()

PAYPAL RESPONSE:
responseEnvelope.timestamp = 2019-08-22T04:03:29.014-07:00
responseEnvelope.ack = Failure
responseEnvelope.correlationId = c6e1241e54f5
responseEnvelope.build = 52656287
error(0).errorId = 550001
error(0).domain = PLATFORM
error(0).subdomain = Application
error(0).severity = Error
error(0).category = Application
error(0).message = User is not allowed to perform this action

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Error Log ID#: 5795 (If you need to contact us, please give us this Log ID# to assist with troubleshooting.)