Error: Could Not Find Com.Google.Gms:Google-Services:4.2.0

Error: could not find com.google.gms:google-services:4.2.0

Because google-services:4.2.0 is not available at Central Repository, so it needs to be downloaded from Android Tools Repository. To add this to your project add

maven { url 'https://dl.bintray.com/android/android-tools' }

this to buildscript repositories. For more refer to https://mvnrepository.com/artifact/com.google.gms/google-services/4.2.0

buildscript {
    repositories {
        jcenter()
        google()
        maven {
            url 'https://maven.fabric.io/public'
        }
        //  Add this to your project 
        maven { url 'https://dl.bintray.com/android/android-tools' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath 'com.google.gms:google-services:4.2.0'

        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
        // These docs use an open ended version so that our plugin
        // can be updated quickly in response to Android tooling updates

        // We recommend changing it to the latest version from our changelog:
        // https://docs.fabric.io/android/changelog.html#fabric-gradle-plugin
        classpath 'io.fabric.tools:gradle:1.27.0'
    }
}

allprojects {
    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com/'
        }
        google()
    }
}

Could not find com.google.gms:google-services:4.2.3

The version 'com.google.gms:google-services:4.2.3' doesn't exist.

You can use one of these:

classpath 'com.google.gms:google-services:4.3.3'
classpath 'com.google.gms:google-services:4.3.2'
classpath 'com.google.gms:google-services:4.3.1'
classpath 'com.google.gms:google-services:4.3.0'
classpath 'com.google.gms:google-services:4.2.0'

Can't update to com.google.gms:google-services:4.2.0

@NickUnuchek leave the dependencies block out of the gradle file of your root project, then it will work

In result top level gradle:

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

apply plugin: 'kotlin'

buildscript {
    ext.kotlin_version = '1.3.20'
    repositories {
        google()
        jcenter()
        maven { url 'https://maven.fabric.io/public' }
        //region realm
        maven { url 'http://oss.jfrog.org/artifactory/oss-snapshot-local' }
        //endregion
    }
    dependencies {
        //region google()
        classpath 'com.android.tools.build:gradle:3.3.0'
        //endregion
        //region jcenter()
        classpath 'com.google.gms:google-services:4.2.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.orhanobut.tracklytics:tracklytics-plugin:2.0.0'
        //endregion
        //region maven { url 'https://maven.fabric.io/public' }
        //to check fabric gradle ver
        //https://s3.amazonaws.com/fabric-artifacts/public/io/fabric/tools/gradle/maven-metadata.xml
        classpath 'io.fabric.tools:gradle:1.+'
        //endregion
        //region realm
        classpath "io.realm:realm-gradle-plugin:5.8.0"
        //endregion
    }
}

allprojects {
    repositories {
        mavenLocal()
        google()
        jcenter()
        mavenCentral()
        maven { url 'https://maven.fabric.io/public' }
        maven { url "https://dl.bintray.com/nickunuchek/maven" }
        maven { url "https://jitpack.io" }
    }

    configurations.all {
        exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jre7'
    }
}

dependencies {
    //REMOVED FROM TOP-LEVEL implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
}

compileKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}
compileTestKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

app/build.gradle:

apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

android {
   ...

    defaultConfig {
     ...
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }

    dexOptions {
        javaMaxHeapSize "8g"
        preDexLibraries = false
    }

    compileOptions {
        sourceCompatibility 1.8
        targetCompatibility 1.8
    }

}

dependencies {
  ...
  implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"//MOVED HERE FROM TOP-LEVEL GRADLE
}

apply plugin: 'com.google.gms.google-services'