Android Studio 新規プロジェクト作成でいきなりERROR

新規Android Studi プロジェクトｎ開始　空のアクティビティーを追加してビルドをかけるとエラー。

エラー:A problem occurred configuring project ':app'.
> Could not resolve all dependencies for configuration ':app:_debugUnitTestApkCopy'.
   > Could not resolve junit:junit:4.12.
     Required by:
         project :app
      > Could not resolve junit:junit:4.12.
         > Could not get resource 'https://jcenter.bintray.com/junit/junit/4.12/junit-4.12.pom'.
            > Could not HEAD 'https://jcenter.bintray.com/junit/junit/4.12/junit-4.12.pom'.
               > jcenter.bintray.com



Android →　Gradle スクリプト→build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        jcenter()　　→　　jcenter { url "http://jcenter.bintray.com" }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
        // NOTE: Do not place your application dependencies here; they belong        // in the individual module build.gradle files    }
}

allprojects {
    repositories {
        jcenter()　　→　jcenter { url "http://jcenter.bintray.com" }
    }
}

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