NACv2 Service responding back with 401 unauthorised.

Question

https://fef.amsua0102.manage.microsoft.com/TrafficGateway/TrafficRoutingService/ResourceAccess/ComplianceRetrievalService/services?api-version=2.0

With access token is responding back with below:

{"Message":"{\r\n "_version": 3,\r\n "Message": "An error has occurred - Operation ID (for customer support): 00000000-0000-0000-0000-000000000000 - Activity ID: f78ed6ed-1188-482a-ba92-500a2f2cd38c - Url: https://fef.amsua0102.manage.microsoft.com/TrafficGateway/TrafficRoutingService/ResourceAccess/ComplianceRetrievalService/services?api-version=2.0",\r\n "CustomApiErrorPhrase": "",\r\n "RetryAfter": null,\r\n "ErrorSourceService": "",\r\n "HttpHeaders": "{}"\r\n}"}