When creating a new project in Android Studio Arctic Fox Canary 8, this is the app level build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:7.0.0-alpha08"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.30"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

When creating the same new project in the Android Studio 4.1.2, the app-level build.gradle file is this:

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    ext.kotlin_version = "1.3.72"
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.1.2"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

One of the libraries I am using requires the allprojects

I manually tried to add the allprojects section in Canary 8, received this error:

 problem occurred evaluating root project 'My Application'.
> Build was configured to prefer settings repositories over project repositories but repository 'Google' was added by build file 'build.gradle'

Why was the allprojects in Android Studio Canary 8 was removed and how can I add it back so that I can use the libraries?

参考

In Android Studio Arctic Fox Canary 8, the app level build.gradle does not generate allprojects section and causes error when manually added