set-backend-service (0.021 ms)
{
    "message": "Backend service URL was changed.",
    "oldBackendServiceUrl": "",
    "newBackendServiceUrl": "https://XXXX.azurewebsites.net/api",
    "request": {
        "url": "https://XXXX.azurewebsites.net/api/Test"
    }
}
Solution:- Please ensure that you are using the right issuer in the token