Gradle config didn't work

[khenissimehdi]

Hello i dunno why the original gradle config didn't work for me but i was able to get it to work using this ( im new to gradle and android in general so maybe i did something wrong feel free to correct me )

so for anyone who is looking at the source code and want to run here is my gradle build

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext{
        gradle_version = '4.0.0'
        material_design = '1.2.0'
        app_compat = '1.1.0'
        constraint_lyt = '1.1.3'
        espresso_core = '3.2.0'
        junit_x_ext = '1.1.1'
        kotlin_version = "1.6.0"
    }
    repositories {
        google()
        jcenter()
        maven { url "https://maven.google.com" }
    }
    dependencies {
        classpath "com.android.tools.build:gradle:$gradle_version"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

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

allprojects {
    repositories {
        google()
        jcenter()
        maven { url 'https://dl.bintray.com/kotlin/kotlin-eap' }
    }
}

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

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"

    defaultConfig {
        applicationId "com.dev.extensionfunctionusage"
        minSdkVersion 23
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib:1.3.60"
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation "androidx.appcompat:appcompat:$app_compat"
    implementation "androidx.constraintlayout:constraintlayout:$constraint_lyt"
    testImplementation "androidx.test.ext:junit:$junit_x_ext"
    androidTestImplementation "androidx.test.espresso:espresso-core:$espresso_core"
    implementation "com.google.android.material:material:$material_design"
}