Java-соединение Twilio SMS с прокси-аутентификацией

Question

Я настраиваю java-соединение Twilio, используя пример Twilio java-sdk из примеров API. Единственное отличие состоит в том, что мне нужно запустить мое Twilio-соединение через веб-прокси с аутентификацией. Я попытался реализовать решение как это:

Что я пробовал:

package pack;
    import org.apache.http.HttpHost;
    import org.apache.http.NameValuePair;
    import org.apache.http.auth.AuthScope;
    import org.apache.http.auth.UsernamePasswordCredentials;
    import org.apache.http.client.CredentialsProvider;
    import org.apache.http.client.HttpClient;
    import org.apache.http.impl.client.BasicCredentialsProvider;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.impl.conn.DefaultProxyRoutePlanner;
    import org.apache.http.message.BasicNameValuePair;
    import com.twilio.sdk.TwilioRestClient;
    import com.twilio.sdk.TwilioRestException;
    import com.twilio.sdk.resource.factory.MessageFactory;
    import com.twilio.sdk.resource.instance.Account;
    import com.twilio.sdk.resource.instance.Message;
    import java.util.ArrayList;
    import java.util.List;
    public class Example {
        // Find your Account Sid and Token at twilio.com/console
          public static final String ACCOUNT_SID = "accound sid";
          public static final String AUTH_TOKEN = "account token";
          public static final String  PROXY_ADDRESS = "202.146.192.174";
            public static final int     PROXY_PORT = 8080;
            public static final String  PROXY_USER = "user";
            public static final String  PROXY_PASSWORD = "pass";
        public static void main(String[] args) throws TwilioRestException {
            HttpHost proxy = new HttpHost(PROXY_ADDRESS, PROXY_PORT, "http");
            DefaultProxyRoutePlanner routePlanner = new DefaultProxyRoutePlanner(proxy);
            CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
            credentialsProvider.setCredentials(
                new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT),
                new UsernamePasswordCredentials(ACCOUNT_SID, AUTH_TOKEN)
                );    
            CloseableHttpClient httpClient = HttpClients.custom()
                .setRoutePlanner(routePlanner)
                .setDefaultCredentialsProvider(credentialsProvid`enter code here`er)
                .build();
            TwilioRestClient client = new TwilioRestClient(ACCOUNT_SID, AUTH_TOKEN);
            client.setHttpClient(httpClient);
            Account account = client.getAccount();
            MessageFactory messageFactory = account.getMessageFactory();
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("To", "[phone]")); // Replace with a valid phone number for your account.
            params.add(new BasicNameValuePair("From", "[phone]")); // Replace with a valid phone number for your account.`enter code here`
            params.add(new BasicNameValuePair("Body", "Hi, this is Devaraj, sending you message from Twilio"));
            Message sms = messageFactory.create(params);

            } }

Но при запуске кода получаю исключение

Exception in thread "main" java.lang.UnsupportedOperationException: text/html;charset=utf-8 not a supported content type
    at com.twilio.sdk.TwilioRestResponse.getParser(TwilioRestResponse.java:231)
    at com.twilio.sdk.TwilioRestResponse.toMap(TwilioRestResponse.java:244)
    at com.twilio.sdk.TwilioRestException.parseResponse(TwilioRestException.java:58)
    at com.twilio.sdk.TwilioClient.safeRequest(TwilioClient.java:509)
    at com.twilio.sdk.resource.list.MessageList.create(MessageList.java:70)
    at pack.Example.main(Example.java:59)