Why does Flutter compiler tell me that my app doesn't exist? - ios

Question

I'm making an app with Flutter and I need to fetch some data from a Firestore database. I followed the steps to include it in the iOS Xcode project, but I get an error after Xcode build. I am not even using Firebase yet in the app.
I found this answer: App getting crash when click on GoogleSignIn button
But it does not correspond to my problem.
This is the AppDelegate.m (no error reported by Xcode):
#include "AppDelegate.h"
#include "GeneratedPluginRegistrant.h"
#import "GoogleMaps/GoogleMaps.h"
#import Firebase;
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[GMSServices provideAPIKey:#"XXXX"];
[GeneratedPluginRegistrant registerWithRegistry:self];
[FIRApp configure];
// Override point for customization after application launch.
return [super application:application didFinishLaunchingWithOptions:launchOptions];
}
#end
This is the error I get:
Launching lib/main.dart on iPhone 8 in debug mode...
Running Xcode build...
Xcode build done. 7,8s
Configuring the default Firebase app...
6.0.0 - [Firebase/Core][I-COR000004] App with name __FIRAPP_DEFAULT does not exist.
6.0.0 - [Firebase/Analytics][I-ACS023007] Analytics v.60000000 started
6.0.0 - [Firebase/Analytics][I-ACS023008] To enable debug logging set the following application argument: -FIRAnalyticsDebugEnabled (see XXXX)
Configured the default Firebase app __FIRAPP_DEFAULT.
6.0.0 - [Firebase/Core][I-COR000027] The library name (flutter-firebase_core) or version number (0.4.0+1) contain invalid characters. Only alphanumeric, dash, underscore and period characters are allowed.
*** First throw call stack:
(
0 CoreFoundation 0x000000010f5d26fb __exceptionPreprocess + 331
1 libobjc.A.dylib 0x000000010eb76ac5 objc_exception_throw + 48
2 CoreFoundation 0x000000010f5d2555 +[NSException raise:format:] + 197
3 Runner 0x00000001076ca6b6 +[FIRApp configureWithName:options:] + 326
4 Runner 0x00000001076ca54f +[FIRApp configureWithOptions:] + 143
5 Runner 0x00000001076ca47f +[FIRApp configure] + 607
6 Runner 0x000000010757e61c -[AppDelegate application:didFinishLaunchingWithOptions:] + 156
7 UIKitCore 0x0000000119a83311 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 280
8 UIKitCore 0<…>
Error connecting to the service protocol: HttpException: Connection closed before full header was received, uri = http://127.0.0.1:54573/It0MI4dOUXE=/ws
And this is Flutter doctor output:
[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Mac OS X 10.14.4 18E226, locale fr-FR)
• Flutter version 1.5.4-hotfix.2 at /Users/mickaeldebalme/SDK/Flutter/flutter
• Framework revision 7a4c33425d (3 weeks ago), 2019-04-29 11:05:24 -0700
• Engine revision 52c7a1e849
• Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/mickaeldebalme/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /Users/mickaeldebalme/Library/Application
Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/182.5314842/Android
Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)
• All Android licenses accepted.
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.2.1, Build version 10E1001
• ios-deploy 1.9.4
• CocoaPods version 1.6.1
[✓] Android Studio (version 3.3)
• Android Studio at /Users/mickaeldebalme/Library/Application
Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/182.5314842/Android Studio.app/Contents
• Flutter plugin version 34.0.1
• Dart plugin version 182.5215
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)
[✓] Connected device (1 available)
• iPhone 8 • B6399A10-1F2D-44C3-8B0D-6AD086AD0F55 • ios •
com.apple.CoreSimulator.SimRuntime.iOS-12-2 (simulator)
• No issues found!
EDIT
After creating a clean project, the error was still there.
So I did the following:
Upgrading all my plugins to the latest version
Migrating to Android X
Moving the [FIRApp configure]; above the rest of the Objective-C instructions in the AppDelegate.m (yes !)

Answer 1

I finally found a solution.
After creating a clean project, the error was still there. So I did the following:
Upgrading all my plugins to the latest version
Migrating to Android X
Moving the [FIRApp configure]; above the rest of the Objective-C instructions in the AppDelegate.m (yes !)