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Error Codes If an error code starting with APIGW is returned after you call an API, rectify the fault by referring to the instructions provided in API Gateway Error Codes. Table 1 Error codes Status Code Error Code Error Message Description Solution 400 RGC.400 Bad Request: {0}.
This policy is non-compliant if the NAT gateway is not in the specified VPC.
The server was acting as a gateway or proxy and received an invalid response from the upstream server. 503 ServiceUnavailable The requested service is invalid.
This policy is non-compliant if the gateway is not configured with access logs.