'package:firebase_core/firebase_core.dart' => Target of URI doesn't exist ERROR

[EvoRye]

I have Firebase setup working, logged in, CLI is setup and working. The only thing that is giving me an error is: 'package:firebase_core/firebase_core.dart' Target of URI doesn't exist error (red squiggly line).

The dependency seems to be correct. I have tried every possible solution I could find on SO, Google, etc. Tried every chatGPT recommendation. Just cannot get the dependency to work.

Here is my pubspec.yaml:

Here is my main.dart:

import 'package:flutter/material.dart';
import 'package:gogoapp/pages/login_page.dart';
import 'package:firebase_core/firebase_core.dart'; 
import 'firebase_options.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: LoginPage(),
    );
  }
}

Here are a few things I tried:
-flutter clean
-flutter pub get
-flutter channel (on stable) everything is latest version
-restart IDE and restart
-Windows Environment variables (Path) to Flutter and Dart setup.

I've been stuck on this error for the past 3 days. Any suggestions?

Thanks

[RajamdGamer]

I don't know this would help but I just followed the instructions like:

1. Install Firebase CLI here
2. run 'dart pub global activate flutterfire_cli\ in your Flutter project
3. run 'flutterfire configure'
4. 'flutter pub add firebase_core'

The following is my vs code internal Powershell terminal.
Learn more about using this file and next steps from the documentation:

https://firebase.google.com/docs/flutter/setup
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter packages get
Resolving dependencies...
flutter_lints 3.0.2 (4.0.0 available)
leak_tracker 10.0.0 (10.0.5 available)
leak_tracker_flutter_testing 2.0.1 (3.0.5 available)
leak_tracker_testing 2.0.1 (3.0.1 available)
material_color_utilities 0.8.0 (0.11.1 available)
meta 1.11.0 (1.15.0 available)
test_api 0.6.1 (0.7.1 available)
vm_service 13.0.0 (14.2.2 available)
Got dependencies!
9 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter pub outdated
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name Current Upgradable Resolvable Latest
direct dependencies: all up-to-date.

dev_dependencies:
flutter_lints *3.0.2 *3.0.2 4.0.0 4.0.0

1 dependency is constrained to a version that is older than a resolvable version.
To update it, edit pubspec.yaml, or run flutter pub upgrade --major-versions.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter packages upgrade
Resolving dependencies... (2.0s)
flutter_lints 3.0.2 (4.0.0 available)
leak_tracker 10.0.0 (10.0.5 available)
leak_tracker_flutter_testing 2.0.1 (3.0.5 available)
leak_tracker_testing 2.0.1 (3.0.1 available)
material_color_utilities 0.8.0 (0.11.1 available)
meta 1.11.0 (1.15.0 available)
test_api 0.6.1 (0.7.1 available)
vm_service 13.0.0 (14.2.2 available)
No dependencies changed.
9 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter pub outdated
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name Current Upgradable Resolvable Latest
direct dependencies: all up-to-date.

dev_dependencies:
flutter_lints *3.0.2 *3.0.2 4.0.0 4.0.0

1 dependency is constrained to a version that is older than a resolvable version.
To update it, edit pubspec.yaml, or run flutter pub upgrade --major-versions.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter pub upgrade --major-versions
Resolving dependencies... (1.8s)

flutter_lints 4.0.0 (was 3.0.2)
leak_tracker 10.0.0 (10.0.5 available)
leak_tracker_flutter_testing 2.0.1 (3.0.5 available)
leak_tracker_testing 2.0.1 (3.0.1 available)
lints 4.0.0 (was 3.0.0)
material_color_utilities 0.8.0 (0.11.1 available)
meta 1.11.0 (1.15.0 available)
test_api 0.6.1 (0.7.1 available)
vm_service 13.0.0 (14.2.2 available)
Changed 2 dependencies!
7 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.

Changed 1 constraint in pubspec.yaml:
flutter_lints: ^3.0.0 -> ^4.0.0
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp>

• History restored

Package flutterfire_cli is currently active at version 1.0.0.
The package flutterfire_cli is already activated at newest available version.
To recompile executables, first run dart pub global deactivate flutterfire_cli.
Installed executable flutterfire.
Activated flutterfire_cli 1.0.0.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp>

• History restored

Computing fixes in notetakingapp (dry run)...

1 proposed fix in 1 file.

unused_import • 1 fix

To fix an individual diagnostic, run one of:
dart fix --apply --code=unused_import

To fix all diagnostics, run:
dart fix --apply
Computing fixes in notetakingapp...
Applying fixes...

lib\main.dart
unused_import • 1 fix

1 fix made in 1 file.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutterfire configure
? You have an existing firebase.json file and possibly already configured your project for Firebase. Would you prefer to reuse the values in you? You have an existing firebase.json file and possibly already configured your project for Firebase. Would you prefer to reuse the values in you✔ You have an existing firebase.json file and possibly already configured your project for Firebase. Would you prefer to reuse the values in your existing firebase.json file to configure your project? · no
? Generated FirebaseOptions file G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp\lib\firebase_options.dart already exists, do you want
? Generated FirebaseOptions file G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp\lib\firebase_options.dart already exists, do you want
✔ Generated FirebaseOptions file G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp\lib\firebase_options.dart already exists, do you want
to override it? · yes
i Found 2 Firebase projects.
✔ Select a Firebase project to configure your Flutter application with · notesapp-1b1f4 (NotesApp)
✔ Which platforms should your configuration support (use arrow keys & space to select)? · android, windows
i Firebase android app com.example.notetakingapp registered.
i Firebase windows app notetakingapp (windows) registered.

Learn more about using this file and next steps from the documentation:

https://firebase.google.com/docs/flutter/setup
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter pub add firebase_core
Resolving dependencies...

• firebase_core 2.31.0
• firebase_core_platform_interface 5.0.0
• firebase_core_web 2.17.0
• flutter_web_plugins 0.0.0 from sdk flutter
  leak_tracker 10.0.0 (10.0.5 available)
  leak_tracker_flutter_testing 2.0.1 (3.0.5 available)
  leak_tracker_testing 2.0.1 (3.0.1 available)
  material_color_utilities 0.8.0 (0.11.1 available)
  meta 1.11.0 (1.15.0 available)
• plugin_platform_interface 2.1.8
  test_api 0.6.1 (0.7.1 available)
  vm_service 13.0.0 (14.2.2 available)
• web 0.5.1
  Changed 6 dependencies!
  Try flutter pub outdated for more information.
  Building with plugins requires symlink support.

Please enable Developer Mode in your system settings. Run
start ms-settings:developers
to open settings.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> Run

start ms-settings:developers
Run : The term 'Run' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or
At line:1 char:1

• Run

•   + CategoryInfo          : ObjectNotFound: (Run:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
  
  

PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> Run

start ms-settings:developers
Run : The term 'Run' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or
if a path was included, verify that the path is correct and try again.
At line:1 char:1

• Run

•   + CategoryInfo          : ObjectNotFound: (Run:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
  
  

PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter pub add firebase_core
"firebase_core" is already in "dependencies". Will try to update the constraint.
Resolving dependencies...
leak_tracker 10.0.0 (10.0.5 available)
leak_tracker_flutter_testing 2.0.1 (3.0.5 available)
material_color_utilities 0.8.0 (0.11.1 available)
meta 1.11.0 (1.15.0 available)
test_api 0.6.1 (0.7.1 available)
vm_service 13.0.0 (14.2.2 available)
Got dependencies!
7 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.
PS G:\Flutter\Flutter Projects\FlutterXFirebase\notetakingapp> flutter pub outdated
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name Current Upgradable Resolvable Latest

direct dependencies: all up-to-date.

dev_dependencies: all up-to-date.
all dependencies are up-to-date.

[neonzhan]

This worked, thank you

[RajamdGamer]

if possible try running the commands in the terminal in order once , let me know if it got fixed