error": "14 UNAVAILABLE: DNS resolution failed"

[SHUFIL]

I have runing my gRPC services on Kubernetes in front using Envoy , Envoy exposed with aws Load balancer.
When am tring API with domain name http://aws-load-balancer-url.com , it is gettig below error,

error": "14 UNAVAILABLE: DNS resolution failed"

same time i try with witout http:// and url:port number, it is working (aws-load-balancer-url.com:80).
Same is happening when try with port-forwd , API getting ip:port number , at the same will not work http://ip , Envoy is working with port 80 , So it should get with http:// ,

what i need to make changes for getting with http.