[SOLVED] flutter run gives Gradle task assembleDebug failed with exit code 1

I have tried almost everything I could find but I am not able to resolve this error. This is the first time I'm installing flutter on the computer. The first project I try is giving me this error.

I got flutter from their GitHub repo, master branch and I installed all the SDK tools from the AUR. Installed SDK tools

I basically followed this tutorial. I have installed the flutter and dart extensions in VS Code.

I'm doing all this on a vanilla arch system.

I have not done any changes to any part of the code and according to the information that people have asked for, these are the outputs of the commands

flutter run --debug

Using hardware rendering with device Android SDK built for x86. If you notice graphics artifacts, consider enabling software rendering with
"--enable-software-rendering".
Launching lib/main.dart on Android SDK built for x86 in debug mode...

FAILURE: Build failed with an exception.

* What went wrong:
Could not open settings generic class cache for settings file '/home/somannak/Scripts/flutter/anothertry/android/settings.gradle' (/home/somannak/.gradle/caches/6.7/scripts/f0emg6u6oecmxqzgk5g9nn4ui).
> BUG! exception in phase 'semantic analysis' in source unit '_BuildScript_' Unsupported class file major version 61

* 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 521ms
Running Gradle task 'assembleDebug'...                             978ms
Exception: Gradle task assembleDebug failed with exit code 1

flutter run --verbose

[  +47 ms] executing: uname -m
[  +25 ms] Exit code 0 from: uname -m
[        ] x86_64
[   +6 ms] executing: [/home/somannak/applications/flutter/] git -c log.showSignature=false log -n 1 --pretty=format:%H
[   +4 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[        ] fb3f123771d35171b08d1a8b41fccac5816f2f69
[        ] executing: [/home/somannak/applications/flutter/] git tag --points-at fb3f123771d35171b08d1a8b41fccac5816f2f69
[  +11 ms] Exit code 0 from: git tag --points-at fb3f123771d35171b08d1a8b41fccac5816f2f69
[   +1 ms] executing: [/home/somannak/applications/flutter/] git describe --match *.*.* --long --tags fb3f123771d35171b08d1a8b41fccac5816f2f69
[  +32 ms] Exit code 0 from: git describe --match *.*.* --long --tags fb3f123771d35171b08d1a8b41fccac5816f2f69
[        ] 2.6.0-11.0.pre-770-gfb3f123771
[   +6 ms] executing: [/home/somannak/applications/flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[   +4 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[        ] origin/master
[        ] executing: [/home/somannak/applications/flutter/] git ls-remote --get-url origin
[   +5 ms] Exit code 0 from: git ls-remote --get-url origin
[        ] https://github.com/flutter/flutter.git
[  +65 ms] executing: [/home/somannak/applications/flutter/] git rev-parse --abbrev-ref HEAD
[   +4 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[        ] master
[  +47 ms] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[   +2 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'WindowsUwpEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[  +55 ms] executing: /opt/android-sdk/platform-tools/adb devices -l
[  +37 ms] List of devices attached
           emulator-5554          device product:sdk_gphone_x86 model:Android_SDK_built_for_x86 device:generic_x86 transport_id:1
[   +6 ms] /opt/android-sdk/platform-tools/adb -s emulator-5554 shell getprop
[  +19 ms] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[   +1 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'WindowsUwpEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[  +96 ms] Skipping pub get: version match.
[  +54 ms] Generating /home/somannak/Scripts/flutter/anothertry/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
[  +45 ms] ro.hardware = ranchu
[  +11 ms] Using hardware rendering with device Android SDK built for x86. If you notice graphics artifacts, consider enabling software rendering with
           "--enable-software-rendering".
[  +31 ms] Initializing file store
[   +9 ms] Skipping target: gen_localizations
[   +7 ms] gen_dart_plugin_registrant: Starting due to {InvalidatedReasonKind.inputChanged: The following inputs have updated contents:
/home/somannak/Scripts/flutter/anothertry/.dart_tool/package_config_subset}
[  +23 ms] gen_dart_plugin_registrant: Complete
[   +1 ms] Skipping target: _composite
[   +4 ms] complete
[   +7 ms] Launching lib/main.dart on Android SDK built for x86 in debug mode...
[   +4 ms] /home/somannak/applications/flutter/bin/cache/dart-sdk/bin/dart --disable-dart-dev
/home/somannak/applications/flutter/bin/cache/artifacts/engine/linux-x64/frontend_server.dart.snapshot --sdk-root
/home/somannak/applications/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk/ --incremental --target=flutter --debugger-module-names
--experimental-emit-debug-metadata -DFLUTTER_WEB_AUTO_DETECT=true --output-dill /tmp/flutter_tools.PTINBM/flutter_tool.UPUFNQ/app.dill --packages
/home/somannak/Scripts/flutter/anothertry/.dart_tool/package_config.json -Ddart.vm.profile=false -Ddart.vm.product=false --enable-asserts
--track-widget-creation --filesystem-scheme org-dartlang-root --initialize-from-dill build/c075001b96339384a97db4862b8ab8db.cache.dill.track.dill
--flutter-widget-cache --enable-experiment=alternative-invalidation-strategy
[  +12 ms] executing: /opt/android-sdk/platform-tools/adb -s emulator-5554 shell -x logcat -v time -t 1
[  +13 ms] <- compile package:anothertry/main.dart
[  +19 ms] --------- beginning of main
           11-20 04:09:22.351 I/DeviceStateChecker( 3121): DeviceStateChecker cancelled
[  +10 ms] executing: /opt/android-sdk/platform-tools/adb version
[   +7 ms] Android Debug Bridge version 1.0.41
           Version 31.0.3-7562133
           Installed as /opt/android-sdk/platform-tools/adb
[   +2 ms] executing: /opt/android-sdk/platform-tools/adb start-server
[  +25 ms] Building APK
[  +15 ms] Running Gradle task 'assembleDebug'...
[   +3 ms] Using gradle from /home/somannak/Scripts/flutter/anothertry/android/gradlew.
[  +16 ms] executing: [/home/somannak/Scripts/flutter/anothertry/android/] /home/somannak/Scripts/flutter/anothertry/android/gradlew -Pverbose=true
-Ptarget-platform=android-x86 -Ptarget=/home/somannak/Scripts/flutter/anothertry/lib/main.dart -Pbase-application-name=android.app.Application
-Pdart-defines=RkxVVFRFUl9XRUJfQVVUT19ERVRFQ1Q9dHJ1ZQ== -Pdart-obfuscation=false -Ptrack-widget-creation=true -Ptree-shake-icons=false
-Pfilesystem-scheme=org-dartlang-root assembleDebug
[ +557 ms] Welcome to Gradle 6.7!
[        ] Here are the highlights of this release:
[        ]  - File system watching is ready for production use
[        ]  - Declare the version of Java your build requires
[        ]  - Java 15 support
[        ] For more details see https://docs.gradle.org/6.7/release-notes.html
[  +96 ms] FAILURE: Build failed with an exception.
[   +1 ms] * What went wrong:
[        ] Could not open settings generic class cache for settings file '/home/somannak/Scripts/flutter/anothertry/android/settings.gradle'
(/home/somannak/.gradle/caches/6.7/scripts/f0emg6u6oecmxqzgk5g9nn4ui).
[        ] > BUG! exception in phase 'semantic analysis' in source unit '_BuildScript_' Unsupported class file major version 61
[        ] * 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 572ms
[ +374 ms] Running Gradle task 'assembleDebug'... (completed in 1,044ms)
[+6301 ms] Exception: Gradle task assembleDebug failed with exit code 1
[        ] "flutter run" took 7,909ms.
[   +4 ms] 
           #0      throwToolExit (package:flutter_tools/src/base/common.dart:10:3)
           #1      RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:684:9)
           <asynchronous suspension>
           #2      FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart:1161:27)
           <asynchronous suspension>
           #3      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #4      CommandRunner.runCommand (package:args/command_runner.dart:209:13)
           <asynchronous suspension>
           #5      FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:281:9)
           <asynchronous suspension>
           #6      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #7      FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:229:5)
           <asynchronous suspension>
           #8      run.<anonymous closure>.<anonymous closure> (package:flutter_tools/runner.dart:62:9)
           <asynchronous suspension>
           #9      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #10     main (package:flutter_tools/executable.dart:94:3)
           <asynchronous suspension>
           
           
[  +63 ms] ensureAnalyticsSent: 61ms
[        ] Running shutdown hooks
[        ] Shutdown hooks complete
[        ] exiting with code 1

flutter doctor -v

[✓] Flutter (Channel master, 2.6.0-12.0.pre.770, on Arch Linux 5.14.16-arch1-1, locale en_IN.UTF-8)
    • Flutter version 2.6.0-12.0.pre.770 at /home/somannak/applications/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision fb3f123771 (82 minutes ago), 2021-11-19 23:18:08 +0200
    • Engine revision a3ef1d5351
    • Dart version 2.16.0 (build 2.16.0-20.0.dev)
    • DevTools version 2.8.0

[✓] Android toolchain - develop for Android devices (Android SDK version 31)
    • Android SDK at /opt/android-sdk
    • Platform android-31, build-tools 31
    • ANDROID_HOME = /opt/android-sdk
    • Java binary at: /usr/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.1+12)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at google-chrome

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).

[✓] Connected device (2 available)
    • Android SDK built for x86 (mobile) • emulator-5554 • android-x86    • Android 8.1.0 (API 27) (emulator)
    • Chrome (web)                       • chrome        • web-javascript • Google Chrome 94.0.4606.71

! Doctor found issues in 1 category.

contents of pubspec.yaml file

name: anothertry
description: A new Flutter project.

# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.16.0-20.0.dev <3.0.0"

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  flutter:
    sdk: flutter


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2

dev_dependencies:
  flutter_test:
    sdk: flutter

  # The "flutter_lints" package below contains a set of recommended lints to
  # encourage good coding practices. The lint set provided by the package is
  # activated in the `analysis_options.yaml` file located at the root of your
  # package. See that file for information about deactivating specific lint
  # rules and activating additional ones.
  flutter_lints: ^1.0.0

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - images/a_dot_burr.jpeg
  #   - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages