rror when compiling and in flutter pub upgrade and pub outdated - flutter-dependencies

Question

I am creating an application in flutter and everything was going well, but at the moment it started giving me an error. It won't let me compile and flutter pub upgrade and flutter pub outdated don't work, but flutter pub get if it works fine.
I am new to flutter and I will not understand most of the things they tell me, please, if you can explain me as detailed as possible I would appreciate it
Flutter --no-color build apk
C:\src\flutter\bin\flutter.bat --no-color build apk
Building with sound null safety
Running Gradle task 'assembleRelease'...
/C:/Users/LEO/AppData/Local/Pub/Cache/hosted/pub.dev/google_fonts-2.3.3/lib/src/google_fonts_base.dart:14:1: Error: 'AssetManifest' is imported from both 'package:flutter/src/services/asset_manifest.dart' and 'package:google_fonts/src/asset_manifest.dart'.
import 'asset_manifest.dart';
^^^^^^^^^^^^^
/C:/Users/LEO/AppData/Local/Pub/Cache/hosted/pub.dev/google_fonts-2.3.3/lib/src/google_fonts_base.dart:32:31: Error: 'AssetManifest' is imported from both 'package:flutter/src/services/asset_manifest.dart' and 'package:google_fonts/src/asset_manifest.dart'.
AssetManifest assetManifest = AssetManifest();
^^^^^^^^^^^^^
Target kernel_snapshot failed: Exception
FAILURE: Build failed with an exception.
Where:
Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1154
What went wrong:
Execution failed for task ':app:compileFlutterBuildRelease'.
Process 'command 'C:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1
Try:
Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org
BUILD FAILED in 18s
Running Gradle task 'assembleRelease'... 18,8s
Gradle task assembleRelease failed with exit code 1
Process finished with exit code 1`
Flutter pub upgrade
C:\src\flutter\bin\flutter.bat --no-color pub upgrade Resolving dependencies... Git error. Command: git rev-list --max-count=1 HEAD`
stdout:
stderr: usage: git rev-list [] ... [--] [...]
limiting output:
--max-count=
--max-age=
--min-age=
--sparse
--no-merges
--min-parents=
--no-min-parents
--max-parents=
--no-max-parents
--remove-empty
--all
--branches
--tags
--remotes
--stdin
--exclude-hidden=[receive|uploadpack]
--quiet
ordering output:
--topo-order
--date-order
--reverse
formatting output:
--parents
--children
--objects | --objects-edge
--disk-usage[=human]
--unpacked
--header | --pretty
--[no-]object-names
--abbrev= | --no-abbrev
--abbrev-commit
--left-right
--count
special purpose:
--bisect
--bisect-vars
--bisect-all
exit code: 129
Process finished with exit code 69`
Flutter pub get
C:\src\flutter\bin\flutter.bat --no-color pub get Resolving dependencies... build_runner 2.3.3 (2.4.0 available) cross_file 0.3.3+2 (0.3.3+4 available) flutter_adaptive_scaffold 0.0.9 (0.1.0 available) flutter_facebook_auth 4.4.1+1 (5.0.7 available) flutter_facebook_auth_platform_interface 3.2.0 (4.1.1 available) flutter_facebook_auth_web 3.2.0 (4.1.1 available) flutter_html 3.0.0-alpha.5 (3.0.0-alpha.6 available) flutter_html_audio 3.0.0-alpha.3 (3.0.0-alpha.4 available) flutter_html_svg 3.0.0-alpha.3 (3.0.0-alpha.4 available) flutter_html_table 3.0.0-alpha.3 (3.0.0-alpha.4 available) flutter_html_video 3.0.0-alpha.4 (3.0.0-alpha.5 available) flutter_launcher_icons 0.9.3 (0.11.0 available) flutter_layout_grid 1.0.6 (2.0.1 available) flutter_local_notifications 8.2.0 (13.0.0 available) flutter_local_notifications_platform_interface 4.0.1 (6.0.0 available) flutter_slidable 1.3.2 (2.0.0 available) flutter_svg 1.1.6 (2.0.0+1 available) google_fonts 2.3.3 (4.0.3 available) google_geocoding 0.2.0 (discontinued) google_maps_flutter_web 0.3.3 (0.4.0+5 available) image 3.3.0 (4.0.13 available) intl 0.17.0 (0.18.0 available) json_serializable 6.6.0 (6.6.1 available) mobx 2.1.3 (2.1.3+1 available) numerus 1.1.1 (2.0.0 available) share 2.0.4 (discontinued) shared_preferences_foundation 2.1.2 (2.1.3 available) source_gen 1.2.6 (1.2.7 available) table_calendar 3.0.8 (3.0.9 available) timezone 0.8.0 (0.9.1 available) webview_flutter 3.0.4 (4.0.2 available) webview_flutter_android 2.10.4 (3.2.4 available) webview_flutter_platform_interface 1.9.5 (2.0.1 available) webview_flutter_wkwebview 2.9.5 (3.0.5 available) win32 3.1.3 (4.1.1 available) Got dependencies! Process finished with exit code 0
Flutter doctor
`Windows PowerShell
Copyright (C) Microsoft Corporation. Todos los derechos reservados.
PS C:\Windows\System32\WindowsPowerShell\v1.0> flutter doctor -v
[√] Flutter (Channel master, 3.8.0-3.0.pre.22, on Microsoft Windows [Versi¢n 10.0.17763.107], locale es-CU)
• Flutter version 3.8.0-3.0.pre.22 on channel master at C:\src\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 69421c1 (34 hours ago), 2023-02-02 23:28:57 -0800
• Engine revision e3fe6dade9
• Dart version 3.0.0 (build 3.0.0-198.0.dev)
• DevTools version 2.21.1
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
• Android SDK at C:\src\Sdk
• Platform android-33-ext4, build-tools 33.0.0
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
• All Android licenses accepted.
[√] Chrome - develop for the web
• Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe
[√] Visual Studio - develop for Windows (Visual Studio Build Tools 2022 17.4.4)
• Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools
• Visual Studio Build Tools 2022 version 17.4.33213.308
• Windows 10 SDK version 10.0.20348.0
[√] Android Studio (version 2021.3)
• Android Studio at C:\Program Files\Android\Android Studio
• 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 11.0.13+0-b1751.21-8125866)
[√] Connected device (2 available)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Versi¢n 10.0.17763.107]
• Chrome (web) • chrome • web-javascript • Google Chrome 109.0.5414.120
! Device 9888d9463636504450 is offline.
[√] HTTP Host Availability
• All required HTTP hosts are available
• No issues found!
PS C:\Windows\System32\WindowsPowerShell\v1.0>`
I tried flutter clean, pub get, I tried in another project and everything is fine, the error is in this one only

Answer 1

This error message indicates that there is a naming conflict with the import of AssetManifest class in your code. It looks like you have imported the AssetManifest class from both package:flutter/src/services/asset_manifest.dart and package:google_fonts/src/asset_manifest.dart which are conflicting with each other.
To fix this issue, you can specify the import path with an alias to differentiate between the two imports like this:
import 'package:flutter/src/services/asset_manifest.dart' as flutter_asset;
import 'package:google_fonts/src/asset_manifest.dart' as google_fonts_asset;
Then, you can use the aliases to access the AssetManifest class like this:
flutter_asset.AssetManifest
google_fonts_asset.AssetManifest
Alternatively, if you only need to use one of the AssetManifest classes, you can remove the import of the other class to avoid the conflict.