Whenever I try to run flutter app, I am getting this error.

../flutter/.pub-cache/hosted/pub.dartlang.org/percent_indicator-4.2.1/lib/linear_percent_indicator.dart:162:5: Warning: The class 'WidgetsBinding' cannot be null.
Try replacing '?.' with '.'
    WidgetsBinding?.instance.addPostFrameCallback((_) {
    ^^^^^^^^^^^^^^
../flutter/.pub-cache/hosted/pub.dartlang.org/percent_indicator-4.2.1/lib/linear_percent_indicator.dart:162:30: Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../flutter/packages/flutter/lib/src/widgets/binding.dart').
Try calling using ?. instead.
    WidgetsBinding?.instance.addPostFrameCallback((_) {
                             ^^^^^^^^^^^^^^^^^^^^


FAILURE: Build failed with an exception.

* Where:
Script '/home/user/Downloads/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 1102

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command '/home/user/Downloads/flutter/bin/flutter'' 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 22s
Running Gradle task 'assembleDebug'...                             22.8s
Exception: Gradle task assembleDebug failed with exit code 1

Here, is my Flutter doctor output

[✓] Flutter (Channel stable, 2.10.3, on Ubuntu 20.04.4 LTS 5.13.0-41-generic, locale en_IN)
    • Flutter version 2.10.3 at /home/user/Downloads/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 7e9793dee1 (3 months ago), 2022-03-02 11:23:12 -0600
    • Engine revision bd539267b4
    • Dart version 2.16.1
    • DevTools version 2.9.2

[✓] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
    • Android SDK at /home/user/Android/Sdk
    • Platform android-32, build-tools 32.1.0-rc1
    • Java binary at: /opt/android-studio-2021.1.1/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.11 0-b60-7590822)
    • All Android licenses accepted.

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

[✓] Android Studio (version 2021.1)
    • Android Studio at /opt/android-studio-2021.1.1/android-studio
    • Flutter plugin version 66.0.1
    • Dart plugin version 211.7811
    • Java version OpenJDK Runtime Environment (build 11.0.11 0-b60-7590822)

[✓] Android Studio
    • Android Studio at /opt/android-studio
    • Flutter plugin can be installed from: