Service not starting after following examples

[arisAlexis]

The service never starts. I am lost can you help? Here is the code:

// The callback function should always be a top-level function.
@pragma('vm:entry-point')
void startCallback() {
  // The setTaskHandler function must be called to handle the task in the background.
  FlutterForegroundTask.setTaskHandler(FirstTaskHandler());
}

WebSocketChannel? _channel;

class FirstTaskHandler extends TaskHandler {
  Timer? _timer;

  @override
  void onStart(DateTime timestamp, SendPort? sendPort) async {
    // Start sending ping messages periodically
    _timer = Timer.periodic(Duration(seconds: 15), (Timer t) async {
      try {
        _channel!.sink.add(jsonEncode({'type': 'ping'})); // Send a ping message
        print('pinging');
      } catch (e) {
        //there is a problem so we abort
      }
    });
  }

  @override
  void onRepeatEvent(DateTime timestamp, SendPort? sendPort) async {}

  @override
  void onDestroy(DateTime timestamp, SendPort? sendPort) async {
    _timer?.cancel();
  }
}

in the custom _init function I call:

WidgetsBinding.instance.addPostFrameCallback((_) async {
      await _requestPermissionForAndroid();
      await _startForegroundTask();
    });

Future<void> _startForegroundTask() async {
    FlutterForegroundTask.init(
      androidNotificationOptions: AndroidNotificationOptions(
        channelId: 'channel_id',
        channelName: 'Foreground Service',
        channelDescription:
            'This notification appears when the foreground service is running.',
        channelImportance: NotificationChannelImportance.LOW,
        priority: NotificationPriority.LOW,
        iconData: NotificationIconData(
          resType: ResourceType.mipmap,
          resPrefix: ResourcePrefix.ic,
          name: 'launcher',
        ),
      ),
      iosNotificationOptions: const IOSNotificationOptions(
        showNotification: true,
        playSound: false,
      ),
      foregroundTaskOptions: const ForegroundTaskOptions(
        interval: 5000,
        autoRunOnBoot: true,
        allowWifiLock: true,
      ),
    );

    await FlutterForegroundTask.startService(
      notificationTitle: 'Foreground service is running',
      notificationText: 'Tap to return to the app',
      callback: startCallback,
    );
  }

I have the permission added on android manifest. Finally my main widget is wrapped: return WithForegroundTask( child: Scaffold(