Problem im Android Studio (Failed to resolve)

apply plugin: 'com.android.application'


android {
	compileSdkVersion 27


	defaultConfig {
		applicationId "com.test.test"
		minSdkVersion 19
		targetSdkVersion 27
		versionCode 7
		versionName "1.7"
	}
	buildTypes {
		release {
			minifyEnabled false
			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
		}
	}
}


dependencies {
	compile fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:customtabs:27.0.2'
    implementation 'com.google.android.gms:play-services-ads:15.0.1'
    implementation 'com.google.code.gson:gson:2.8.0'
    implementation 'com.github.bumptech.glide:glide:3.7.0'
}
apply plugin: 'com.google.gms.google-services'

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


buildscript {
	repositories {
		jcenter()
		google()
		maven {url "https://maven.google.com"}
	}
	dependencies {
		classpath 'com.android.tools.build:gradle:3.2.1'
		classpath 'com.google.gms:google-services:4.0.2'
		// NOTE: Do not place your application dependencies here; they belong
		// in the individual module build.gradle files
	}
}


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