Run the following code to check your environment

TestTls.java

import java.net.URL;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.SocketException;
import java.io.IOException;

class TestTls {
 public static void main(String[] args){
   URL url = null;
   try {
     url = new URL("https://preview.opentok.com/tls-check.json");
     HttpURLConnection connection = (HttpURLConnection) url.openConnection();
     connection.setRequestMethod("GET");
     connection.connect();
     System.out.println("Connection successfully established with your current TLS configuration, no further action required.");
   } catch(MalformedURLException urlException) {
       System.out.println("No legal protocol found in string or the URL could not be parsed.");
   } catch(SocketException socketException){
     System.out.println("Failed to connect to OpenTok, please check your system and upgrade your environment as needed.");           
   } catch (IOException e) {
     System.out.println("Unknown error talking to OpenTok, please try again later.");     
   }
 }
}