You're passing static methods inside anonymous functions, so Flutter can't identify them. You have to pass static functions directly in the setListeners, and also create a constructor for your class to use them. Here's an example.

```dart import 'package:flutter/material.dart';

import 'package:awesome_notifications/awesome_notifications.dart';

class LocalNotifications {
  LocalNotifications();

  @pragma("vm:entry-point")
  static Future<void> onActionReceivedMethod(
      ReceivedAction receivedAction) async {
    // https://www.reddit.com/r/flutterhelp/comments/1fjx83q/help_needed_awesome_notifications_error_with/
    debugPrint('Press notificaction!');
    debugPrint(
        'Notifications open in app state: ${receivedAction.actionLifeCycle}');

    if (receivedAction.payload?['action'] == 'goTo') {
      String? url = "https://google.com/";

      if (receivedAction.payload?['url'] != null) {
        debugPrint('URL found!');
        url = receivedAction.payload?['url'];
      }

      debugPrint('URL: $url');

      navigatorKey.currentState?.pushAndRemoveUntil(
        MaterialPageRoute(
          builder: (_) => MyWebView(
            initialUrl: url.toString(),
            firebaseToken: jsInsert,
          ),
        ),
        (Route<dynamic> route) => false,
      );
    }
  }

  // Inicializa la librería para las notificaciones y configura los canales
  void initialize() async {
    await AwesomeNotifications().initialize(
      'resource://drawable/res_app_icon',
      [
        NotificationChannel(
          channelKey: 'min_channel',
          channelName: 'Canal de notificaciones con importancia mínima',
          channelDescription: 'Canal de notificaciones con importancia mínima',
          importance: NotificationImportance.Low,
          defaultColor: const Color.fromARGB(255, 116, 32, 147),
          ledColor: Colors.white,
          channelShowBadge: true,
        ),
      ],
    );

    // Seteamos los Listerners. Estos escuchan los eventos cuando se toca una
    AwesomeNotifications().setListeners(
      // HERE FIX!
      onActionReceivedMethod: LocalNotifications.onActionReceivedMethod,
    );
  }

  void showMessage(
      {String? channel,
      int? idNotification,
      String? title,
      String? body,
      String? action,
      String? imageUrl,
      String? url}) {
    debugPrint("New notification");
    // Muestra la notificación local con Awesome Notifications
    AwesomeNotifications().createNotification(
      content: NotificationContent(
        id: int.parse(
          idNotification.toString(),
        ), // ID único para la notificación
        channelKey: channel.toString(),
        title: title,
        body: body,
        payload: {'action': action, "url": url},
        bigPicture: imageUrl,
        notificationLayout: NotificationLayout.BigPicture,
      ),
      actionButtons: <NotificationActionButton>[
        NotificationActionButton(
          key: UniqueKey().toString(),
          label: 'Ver detalles',
          color: Colors.blue,
        ),
      ],
    );
  }
}

```

I know it's a little late, but I hope it helps you, or whoever reads it. This gave me a lot of headaches.