iOS Simulator unable to connect signalR Hub about signalr_flutter HOT 6 CLOSED

Hi, I am using below code in my dart project. class SignalRClient { static SignalRClient _client; static SignalRClient getInstance() { if (_client == null) { _client = SignalRClient._(); } return _client; } SignalRClient._(); SignalR _signalR; String _signalRStatus; Future<bool> connectToHub() async { _signalR = SignalR(kSingalRUrl, kHubName, statusChangeCallback: _onStatusChange, hubCallback: _onNewMessage); bool connected = await _signalR.connect(); print("Signal Connecting : $connected"); return connected; } _onStatusChange(status) async { print("statusChangeCallback: " + status); _signalRStatus = status; if (status == "Connected") { await subscribedToChannel(methodName); await subscribedToChannel(event1); await subscribedToChannel(event2); await subscribedToChannel(channelDispatch); await subscribedToChannel(channel1); await subscribedToChannel(channel2); await subscribedToChannel(channelKey); List arguments = [channelKey, channelDispatch]; var r = await _signalR.invokeMethod(methodName, arguments: arguments); print("Invoke $methodName: $arguments ==> $r"); arguments = [channelKey, channel2]; r = await _signalR.invokeMethod(methodName, arguments: arguments); print("Invoke $methodName: $arguments ==> $r"); arguments = [channelKey, channel1]; r = await _signalR.invokeMethod(methodName, arguments: arguments); print("Invoke $methodName: $arguments ==> $r"); } else if (status == "Reconnecting") { } else if (status == "Disconnected") {} } _onNewMessage(message) { // if (event == 'web_booking') {} print("\n\n\n\nHurrey New Message received : \n$message\n\n"); } Future<void> disconnectToHub() async { _signalR.stop(); } Future<void> subscribedToChannel(String channel) async { if (_signalRStatus != SignalRStatus.connected) { _signalR.reconnect(); } _signalR.subscribeToHubMethod(channel); print("SignalR Subscribed: $channel"); } Future<void> sendTest() async { var result = await _signalR.invokeMethod('send', arguments: [channelKey, channelDispatch, "event", "Message"]); print(result); } }