Mobile notifications wrapper gives error on Android

Hi, I'm using Unity's mobile notifications wrapper script as shown in here: https://github.com/Unity-Technologies/NotificationsSamples My code is this:

Code (CSharp):

1. GameNotificationsManager manager = Camera.main.GetComponent<GameNotificationsManager>();
2.         var channel = new GameNotificationChannel("default", "Default Game Channel", "Generic notifications");
3.         if (!manager.Initialized)
4.         {
5.             manager.Initialize(channel);
6.         }
7.         IGameNotification notification = manager.CreateNotification();
8.         notification.Title = "Come back!";
9.         notification.Body = "Your energy is full. Come back and run!";
10.         //DateTime deliveryTime = DateTime.Now.AddHours(4);
11.         DateTime deliveryTime = DateTime.Now.AddSeconds(4);
12.         notification.DeliveryTime = deliveryTime;
13.         manager.ScheduleNotification(notification);

When I debug the app on my phone I get this error:

Code (CSharp):

1. AndroidJavaException: java.lang.NoSuchMethodError: no non-static method with name='registerNotificationChannel' signature='(Ljava/lang/String;Ljava/lang/String;ILjava/lang/String;ZZZZ[II)V' in class Ljava.lang.Object;
2.     java.lang.NoSuchMethodError: no non-static method with name='registerNotificationChannel' signature='(Ljava/lang/String;Ljava/lang/String;ILjava/lang/String;ZZZZ[II)V' in class Ljava.lang.Object;
3.         at com.unity3d.player.ReflectionHelper.getMethodID(Unknown Source:180)
4.         at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
5.         at com.unity3d.player.UnityPlayer.c(Unknown Source:0)
6.         at com.unity3d.player.UnityPlayer$e$1.handleMessage(Unknown Source:95)
7.         at android.os.Handler.dispatchMessage(Handler.java:102)
8.         at android.os.Looper.loop(Looper.java:214)
9.         at com.unity3d.player.UnityPlayer$e.run(Unknown Source:20)
10.       at UnityEngine.AndroidJNISafe.CheckException () [0x00000] in <00000000000000000000000000000000>:0
11.       at UnityEngine.AndroidJNISafe.CallStaticObjectMethod (System.IntPtr clazz, System.I

And the notifications doesn't work. I've searched for the error code but couldn't find an answer helping me. Could someone help me about this issue?

 

I have created an empty project and used same code and the outcome is the same as well. I'm using IL2CPP.
Edit: Issue resolved when I updated to the preview mobile notifications package.

 

You saved my day!!