Production Mode error

Below is for live testing 
URL :: https://proxy.momoapi.mtn.com/v1_0/apiuser
headers :: {X-Reference-Id: id, Ocp-Apim-Subscription-Key: key, Content-Type: application/json}
body :: {providerCallbackHost: https://dulu.cm/success}
apiuserAPI :: 404 :: { "statusCode": 404, "message": "Resource not found" }