2502608 - "Internal Server Error" happens when importing huge data from Concur into a model in SAP Analytics Cloud (BOC)

The error message below shows when importing huge data from Concur into a model in SAP Analytics Cloud:

Error occurred in driver: An unexpected error occurred. Contact system administrator for help. : External Data Service Returned Error: Internal Error occurred : { "Error": { "Message":"Internal Server Error", "Server-Time":"xxxxxxx", "Id":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" } }

Error seen in Har log: "Error occurred in SAP Concur driver: The user doesn't have permission to access the requested resource."

• SAP Analytics Cloud 2017.12.1

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