خطای sync شدن گرید موقع ایجاد برنامه در اندروید استودیو 3.1.1

اندروید 3.1.1 رو نصب کردم (گریدل 4.4)
اما نیم ساعت با شیلتر شکن جون میکنه ولی باز آخر sync نمیشه (به نظرم به نسخه appcompat ربط داره)
من این خط رو
اینو به 2.0.3 / 2.1.1 تغییر دادم ولی باز مشابه همین خطا ها داد
گریدل

apply plugin: 'com.android.application'
android {
 compileSdkVersion 27
 defaultConfig {
 applicationId "com.androiddev.exampleapp"
 minSdkVersion 17
 targetSdkVersion 27
 versionCode 1
 versionName "1.0"
 testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunne r"
 }
 buildTypes {
 release {
 minifyEnabled false
 proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 }
 }
 buildToolsVersion '27.0.3'

 buildscript {
 repositories {
 jcenter()
 google()
 maven { url 'http://repo1.maven.org/maven2' }
 maven { url 'http://jcenter.bintray.com' }
 maven { url "https://maven.google.com" }
 maven { url "https://jitpack.io" }
 }
 dependencies { classpath 'com.android.tools.build:gradle:3.1.0' }
 }
}

dependencies {
 implementation fileTree(include: ['*.jar'], dir: 'libs')
 implementation 'com.android.support:appcompat-v7:27.0.2'
 implementation 'com.android.support:design:27.0.2'
 implementation 'com.android.support.constraint:constraint-layout:1.0.2'
 implementation 'com.android.support:support-vector-drawable:27.0.2'
 testImplementation 'junit:junit:4.12'
 androidTestImplementation 'com.android.support.test:runner:1.0.1'
 androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1' }

این ارور

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:appcompat-v7:27.0.2.Open File
Show Details

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:design:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:support-vector-drawable:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.test:runner:1.0.1.
Open File
Show Details

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.test.espresso:espresso-core:3.0.1.
Open File
Show Details

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support:design:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support:support-vector-drawable:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support:design:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support:support-vector-drawable:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve junit:junit:4.12.
Open File
Show Details

Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support:appcompat-v7:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support:design:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support:support-vector-drawable:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support:design:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support:support-vector-drawable:27.0.2.
Open File
Show Details

Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve junit:junit:4.12.
Open File Show Details