Cannot invoke method substring() on null object

[aprizzo]

I updated AndroidStudio to Ladybug | 2024.2.1 Patch 2, and since then I cannot build my project containing ai_barcode because of the following error:

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':ai_barcode'.
> Failed to notify project evaluation listener.
   > Cannot invoke method substring() on null object
   > compileSdkVersion is not specified. Please add it to build.gradle

* 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 13s

Despite the error, I actually have compileSdkVersion stated in my app/build.gradle:

android {
    namespace "com.myapp"
    compileSdkVersion 34
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        applicationId "com.myapp"
        minSdkVersion 21
        targetSdkVersion 34
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }
// Rest of the file

Here's my flutter doctor:

flutter doctor -v
[✓] Flutter (Channel stable, 3.24.5, on macOS 15.1.1 24B91 darwin-arm64, locale it-IT)
    • Flutter version 3.24.5 on channel stable at /Users/myuser/Developer/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision dec2ee5c1f (3 settimane fa), 2024-11-13 11:13:06 -0800
    • Engine revision a18df97ca5
    • Dart version 3.5.4
    • DevTools version 2.37.3

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/myuser/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • ANDROID_SDK_ROOT = /Users/myuser/Library/Android/sdk/
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 21.0.3+-79915917-b509.11)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16B40
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • 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 21.0.3+-79915917-b509.11)

[✓] VS Code (version 1.95.3)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.102.0

[✓] Network resources
    • All expected network resources are available.

• No issues found!