[Solved] API Error: Network error communicating with endpoint

Hi

I am getting error - {"message": "Network error communicating with endpoint"}

var client = new RestClient("https://api.nimbuspost.com/v1/courier/serviceability");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
request.AddHeader("Content-Type", "application/json");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);

Thanks