fixes #1538

(cherry picked from commit 88dfb2bc7a)

src/client/js/system/client.js

@@ -9,12 +9,8 @@ define([
 		doneConnect: false,
 
 		init: function (onReady) {
-			let tType = 'websocket';
-			if (window.location.href.indexOf('polling') > -1)
-				tType = 'polling';
-
 			this.socket = io({
-				transports: [tType]
+				transports: ['websocket']
 			});
 
 			this.socket.on('connect', this.onConnected.bind(this, onReady));

src/server/server.js

@@ -8,7 +8,9 @@ module.exports = {
 	init: function (callback) {
 		let app = require('express')();
 		let server = require('http').createServer(app);
-		let socketServer = require('socket.io')(server);
+		let socketServer = require('socket.io')(server, {
+			transports: ['websocket']
+		});
 
 		global.cons.sockets = socketServer.sockets;