.Net Core 2 Spring.Rest.Client.RestTemplate Operation is not supported on this platform. Exception

Question

I'm using Spring.Net.Social.Core to get access to web API. Authorization goes correct but when I'm trying to send GET request to server ...

RestOperations.GetForMessage<JsonValue>($"https://www.blablabla.com/{url}?tq={query}")

I have "Operation is not supported on this platform" error. StackTrace below:

   at System.Net.SystemWebProxy.GetProxy(Uri destination)
   at System.Net.ServicePointManager.ProxyAddressIfNecessary(Uri& address, IWebProxy proxy)
   at System.Net.ServicePointManager.FindServicePoint(Uri address, IWebProxy proxy)
   at System.Net.HttpWebRequest.get_ServicePoint()
   at Spring.Http.Client.WebClientHttpRequestFactory.CreateRequest(Uri uri, HttpMethod method)
   at Spring.Http.Client.Interceptor.InterceptingClientHttpRequestFactory.RequestCreation.Create()
   at Spring.Http.Client.Interceptor.InterceptingClientHttpRequestFactory.RequestCreation.Create()
   at Spring.Http.Client.Interceptor.InterceptingClientHttpRequestFactory.CreateRequest(Uri uri, HttpMethod method)
   at Spring.Rest.Client.RestTemplate.DoExecute[T](Uri uri, HttpMethod method, IRequestCallback requestCallback, IResponseExtractor`1 responseExtractor)
   at Spring.Rest.Client.RestTemplate.Execute[T](String url, HttpMethod method, IRequestCallback requestCallback, IResponseExtractor`1 responseExtractor, Object[] uriVariables)
   at Spring.Rest.Client.RestTemplate.GetForMessage[T](String url, Object[] uriVariables)