[firebase_messaging] Error while calling method messaging#getToken & Messaging#subscribeToTopic

[FortySL]

Hello World,

I am new to flutter and writing the function for receiving notification on both iOS and Android platform. I achieved this function and it was working well but these days I got an issue:

FLTFirebaseMessaging: An error occurred while calling method Messaging#getToken, errorOrNil => {
}
FLTFirebaseMessaging: An error occurred while calling method Messaging#subscribeToTopic, errorOrNil => {
}
[VERBOSE-2:ui_dart_state.cc(209)] Unhandled Exception: [firebase_messaging/unknown] An unknown error has occurred.
#0      MethodChannelFirebaseMessaging.getToken (package:firebase_messaging_platform_interface/src/method_channel/method_channel_messaging.dart:229:7)
<asynchronous suspension>
[VERBOSE-2:ui_dart_state.cc(209)] Unhandled Exception: [firebase_messaging/unknown] An unknown error has occurred.
#0      MethodChannelFirebaseMessaging.subscribeToTopic (package:firebase_messaging_platform_interface/src/method_channel/method_channel_messaging.dart:371:7)
<asynchronous suspension>

This only happened on iOS platform (Android is working well), I have tried to find the reason so I rollback to previous commit and I can see this happened after I added Push Notification and Background Modes capabilities to Runner Target, but these two are the main cores for receiving notification on iOS platforms. :3. I also tried to remove these two capabilities, the error still exit, so it is very confusing.

Any suggestions would be appreciated!

Here is Flutter Doctor -v

[✓] Flutter (Channel stable, 2.8.1, on macOS 11.5.1 20G80 darwin-arm, locale en-AU)
    • Flutter version 2.8.1 at /Applications/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 77d935af4d (5 weeks ago), 2021-12-16 08:37:33 -0800
    • Engine revision 890a5fca2e
    • Dart version 2.15.1

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/bpc/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7249189)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2020.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7249189)

[✓] VS Code (version 1.63.2)
    • VS Code at /Users/bpc/Downloads/Visual Studio Code.app/Contents
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

Here is the code

    //ios part permission
    FirebaseMessaging.instance.requestPermission().then((value) {
      print(value);});
    FirebaseMessaging.instance.getToken().then((token){
      print(token);});
    FirebaseMessaging.instance.getAPNSToken().then((APNStoken){
      print(APNStoken);});
  }

And I am using
firebase_messaging: ^11.2.5