Flutter Firebase does work on my main setup but not on my second although its the same app

I use two different Systems for coding. At home, I have an iMac and while I am traveling or on business trips I have a Windows laptop. When working from home, I don’t have any problems running and developing my flutter app on both, iOS and Android.

However, when I am traveling I use my Windows Laptop I get weird errors from Firebase and my App seems to not like Firebase. I use Firebase Remote Config and Firebase Cloud Messaging.

When running my Android app on my Windows Laptop and try to get an FCM token, I get the following error:

E/FirebaseInstanceId( 4181): Failed to get FIS auth token
E/FirebaseInstanceId( 4181): java.util.concurrent.ExecutionException: com.google.firebase.installations.FirebaseInstallationsException: Firebase Installations Service is unavailable. Please try again later.
E/FirebaseInstanceId( 4181):  at com.google.android.gms.tasks.Tasks.zza(com.google.android.gms:play-services-tasks@@18.0.2:5)
E/FirebaseInstanceId( 4181):  at com.google.android.gms.tasks.Tasks.await(com.google.android.gms:play-services-tasks@@18.0.2:8)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.GmsRpc.setDefaultAttributesToBundle(com.google.firebase:firebase-iid@@21.1.0:11)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.GmsRpc.startRpc(com.google.firebase:firebase-iid@@21.1.0:1)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.GmsRpc.getToken(com.google.firebase:firebase-iid@@21.1.0:1)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.FirebaseInstanceId.lambda$getInstanceId$2$FirebaseInstanceId(com.google.firebase:firebase-iid@@21.1.0:1)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.FirebaseInstanceId$$Lambda$3.start(Unknown Source:10)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.RequestDeduplicator.getOrStartGetTokenRequest(com.google.firebase:firebase-iid@@21.1.0:7)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.FirebaseInstanceId.lambda$getInstanceId$3$FirebaseInstanceId(com.google.firebase:firebase-iid@@21.1.0:5)
E/FirebaseInstanceId( 4181):  at com.google.firebase.iid.FirebaseInstanceId$$Lambda$0.then(Unknown Source:6)
E/FirebaseInstanceId( 4181):  at com.google.android.gms.tasks.zze.run(com.google.android.gms:play-services-tasks@@18.0.2:1)
E/FirebaseInstanceId( 4181):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
E/FirebaseInstanceId( 4181):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
E/FirebaseInstanceId( 4181):  at com.google.android.gms.common.util.concurrent.zza.run(com.google.android.gms:play-services-basement@@18.2.0:2)
E/FirebaseInstanceId( 4181):  at java.lang.Thread.run(Thread.java:1012)
E/FirebaseInstanceId( 4181): Caused by: com.google.firebase.installations.FirebaseInstallationsException: Firebase Installations Service is unavailable. Please try again later.
E/FirebaseInstanceId( 4181):  at com.google.firebase.installations.remote.FirebaseInstallationServiceClient.createFirebaseInstallation(FirebaseInstallationServiceClient.java:153)
E/FirebaseInstanceId( 4181):  at com.google.firebase.installations.FirebaseInstallations.registerFidWithServer(FirebaseInstallations.java:533)
E/FirebaseInstanceId( 4181):  at com.google.firebase.installations.FirebaseInstallations.doNetworkCallIfNecessary(FirebaseInstallations.java:387)
E/FirebaseInstanceId( 4181):  at com.google.firebase.installations.FirebaseInstallations.lambda$doRegistrationOrRefresh$3$com-google-firebase-installations-FirebaseInstallations(FirebaseInstallations.java:372)
E/FirebaseInstanceId( 4181):  at com.google.firebase.installations.FirebaseInstallations$$ExternalSyntheticLambda0.run(Unknown Source:4)
E/FirebaseInstanceId( 4181):  at com.google.firebase.concurrent.SequentialExecutor$1.run(SequentialExecutor.java:117)
E/FirebaseInstanceId( 4181):  at com.google.firebase.concurrent.SequentialExecutor$QueueWorker.workOnQueue(SequentialExecutor.java:229)
E/FirebaseInstanceId( 4181):  at com.google.firebase.concurrent.SequentialExecutor$QueueWorker.run(SequentialExecutor.java:174)
E/FirebaseInstanceId( 4181):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
E/FirebaseInstanceId( 4181):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
E/FirebaseInstanceId( 4181):  at com.google.firebase.concurrent.CustomThreadFactory.lambda$newThread$0$com-google-firebase-concurrent-CustomThreadFactory(CustomThreadFactory.java:47)
E/FirebaseInstanceId( 4181):  at com.google.firebase.concurrent.CustomThreadFactory$$ExternalSyntheticLambda0.run(Unknown Source:4)

And this is the error I get for Firebase Remote config (also Android/Windows setup):

E/flutter ( 4181): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_remote_config/internal] internal remote config fetch error
E/flutter ( 4181): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:651:7)
E/flutter ( 4181): #1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:334:18)
E/flutter ( 4181): <asynchronous suspension>
E/flutter ( 4181): #2      MethodChannelFirebaseRemoteConfig.fetchAndActivate (package:firebase_remote_config_platform_interface/src/method_channel/method_channel_firebase_remote_config.dart:150:29)
E/flutter ( 4181): <asynchronous suspension>
E/flutter ( 4181): #3      FirebaseRemoteConfig.fetchAndActivate (package:firebase_remote_config/src/firebase_remote_config.dart:89:26)
E/flutter ( 4181): <asynchronous suspension>
E/flutter ( 4181): #4      BootService.initFirebase (package:myapp_app/services/boot_service.dart:32:5)
E/flutter ( 4181): <asynchronous suspension>
E/flutter ( 4181): #5      main (package:myapp_app/main.dart:16:3)
E/flutter ( 4181): <asynchronous suspension>

I also do have an old MacBook and tried to get my app to run on iOS to test whether it is a Windows/setup problem or if I can re-create the problem. There I get a totally other problem:

[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [firebase_remote_config/internal] Failed to get installations token. Error : Error Domain=com.firebase.installations Code=2 "Too many server requests." UserInfo={NSLocalizedFailureReason=Too many server requests.}.

When trying to print the FCM token with an Android device on my Mac I get the same error as on my Windows laptop with an Android device (see above).

This is my main.dart:

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await BootService.initFirebase();
  ...
  ... 
  ...

 runApp(...)
}

And this is my boot_service.dart file:

class BootService {
  static initFirebase() async {
    await Firebase.initializeApp(
      options: DefaultFirebaseOptions.currentPlatform,
    );

    /// Remote Config
    final remoteConfig = FirebaseRemoteConfig.instance;
    await remoteConfig.setConfigSettings(RemoteConfigSettings(
      fetchTimeout: const Duration(minutes: 1),
      minimumFetchInterval: const Duration(hours: 1),
    ));
    
    await remoteConfig.setDefaults(ConfigFirebaseRemote.keyValuePairs);
    
    await remoteConfig.fetchAndActivate();
  }

  ...
  ...
  ...
}

I still don’t understand how it is possible that on my main setup (iMac) I can run both, Android and iOS without getting any errors… My google-services.json as well as my GoogleService-Info.plist are all correct set.

Inspired by this Stack answer, I also tested if my configuration works with the following CURL command. And yeah, it does work. I don’t get any error. It successfully authenticates.

api_key=<YOUR_API_KEY>
project_identifier=<YOUR_PROJECT_ID>
app_id=<YOUR_FIREBASE_APP_ID_EXAMPLE_1:12345678:android:00000aaaaaaaa>

curl -H "content-type: application/json" -d "{appId: '$app_id', sdkVersion: 't:1'}" https://firebaseinstallations.googleapis.com/v1/projects/$project_identifier/installations/?key=$api_key

My packages.yaml file:

environment:
  sdk: '>=3.3.1 <4.0.0'

firebase_messaging: ^14.7.20
firebase_core: ^2.27.1
firebase_remote_config: ^4.3.18

Here are my flutter doctor -v prints for all three of my machines.
Main Setup (iMac):

[✓] Flutter (Channel stable, 3.19.3, on macOS 14.4 23E214 darwin-arm64, locale de-DE)
    • Flutter version 3.19.3 on channel stable at /opt/homebrew/Caskroom/flutter/3.13.9/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ba39319843 (10 days ago), 2024-03-07 15:22:21 -0600
    • Engine revision 2e4ba9c6fb
    • Dart version 3.3.1
    • DevTools version 2.31.1

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/jantrier/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15E204a
    • CocoaPods version 1.15.2

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

[✓] Android Studio (version 2022.2)
    • 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 17.0.6+0-17.0.6b802.4-9586694)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2.5)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    • Flutter plugin version 77.1.3
    • Dart plugin version 232.10286

[✓] VS Code (version 1.87.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (2 available)
    • macOS (desktop) • macos  • darwin-arm64   • macOS 14.4 23E214 darwin-arm64
    • Chrome (web)    • chrome • web-javascript • Google Chrome 122.0.6261.129

[✓] Network resources
    • All expected network resources are available.

Second Setup (Windows):

[√] Flutter (Channel stable, 3.19.3, on Microsoft Windows [Version 10.0.19045.4170], locale de-DE)
    • Flutter version 3.19.3 on channel stable at C:UsersUserDesktopflutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ba39319843 (11 days ago), 2024-03-07 15:22:21 -0600
    • Engine revision 2e4ba9c6fb
    • Dart version 3.3.1
    • DevTools version 2.31.1

[√] Windows Version (Installed version of Windows is version 10 or higher)

[√] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
    • Android SDK at C:UsersUserAppDataLocalAndroidsdk
    • Platform android-34, build-tools 33.0.1
    • Java binary at: C:Program FilesJavajdk-11.0.17binjava
    • Java version Java(TM) SE Runtime Environment 18.9 (build 11.0.17+10-LTS-269)
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at C:Program FilesGoogleChromeApplicationchrome.exe

[X] Visual Studio - develop Windows apps
    X Visual Studio not installed; this is necessary to develop Windows apps.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components

[√] Android Studio (version 2023.2)
    • Android Studio at C:Program FilesAndroidAndroid Studio1
    • 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 17.0.9+0--11185874)

[√] Network resources
    • All expected network resources are available.

My old MacBook:

[✓] Flutter (Channel stable, 3.19.3, on macOS 14.2.1 23C71 darwin-arm64, locale en-DE)
    • Flutter version 3.19.3 on channel stable at /Users/user/Desktop/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ba39319843 (11 days ago), 2024-03-07 15:22:21 -0600
    • Engine revision 2e4ba9c6fb
    • Dart version 3.3.1
    • DevTools version 2.31.1

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.2)
    • Android SDK at /Users/user/Library/Android/sdk
    • Platform android-34, build-tools 33.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15C500b
    • CocoaPods version 1.14.3

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

[✓] Android Studio (version 2023.1)
    • 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 17.0.7+0-17.0.7b1000.6-10550314)

[✓] VS Code (version 1.87.2)
    • VS Code at /Users/user/Desktop/setups/Visual Studio Code.app/Contents
    • Flutter extension version 3.84.0

[✓] Connected device (2 available)
    • macOS (desktop)           • macos         • darwin-arm64   • macOS 14.2.1 23C71 darwin-arm64
    • Chrome (web)              • chrome        • web-javascript • Google Chrome 122.0.6261.129

[✓] Network resources
    • All expected network resources are available.

I have also tried to fix my Firebase Remote Config problem with the two following issues, but they did not work:

1. https://github.com/firebase/flutterfire/issues/6196#issuecomment-887399471
2. https://github.com/firebase/flutterfire/issues/6196#issuecomment-927751667

As mentioned from other users I also tried to set up a HotSpot and check date and time on my emulator. But those fixes also didn’t solve my problem…

I really don’t know what to do or try next to fix my problem. I cannot find any other Stack or GitHub issue which has faces the same or a similar issue. The most confusing part is that I have other apps which work very well with Firebase on my Windows Laptop and the app I am talking about in this post is working without any problem on my main setup…

I appreciate any kind of help!