Android Studio 0.8.6 Gradle project sync failed

I just installed the latest Android Studio 0.8.6 (beta) on my MacOSx Snow leopard. After creating a basic project, I have an error message

Gradle project sync failed ....

I added mavenCentral () to repository in build.gradle file. But that doesn't fix:

this is my build.gradle:

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.12.2'

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

allprojects {
    repositories {
        jcenter()
        mavenCentral()
    }
}

      

        
        
        
      

    

build.gradle in my android project looks like this:

apply plugin: 'android'

android {
    compileSdkVersion 19
    buildToolsVersion "19.0.0"

    defaultConfig {
        applicationId "app.helloworld"
        minSdkVersion 19
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:19.+'
}

      

        
        
        
      

    

Using the command line:

./gradlew assembleDebug --stacktrace

      

        
        
        
      

    

I got the error:

FAILURE: Build failed with an exception.

      

        
        
        
      

    

• What went wrong: There was a problem configuring the root HelloWorld project.

  Failed to resolve all dependencies for configuration: classpath. Failed to resolve com.android.tools.build: gradle: 0.12.2. Required:: HelloWorld: undefined org.slf4j.spi.LocationAwareLogger.log (Lorg / SLF4J / Marker; Ljava / Languages ​​/ String; ILjava / Languages ​​/ String; [Ljava / Languages ​​/ Object; Ljava / Languages ​​/ Throwable;) V , org.slf4j.spi.LocationAwareLogger.log (Lorg / SLF4J / Marker; Ljava / Languages ​​/ String; ILjava / Languages ​​/ String; [Ljava / Languages ​​/ Object; Ljava / Languages ​​/ Throwable;)