Crashlytics开发人员工具错误

Question

我在Android Studio中的build.gradle中有以下代码：

buildscript {
  repositories {
    maven { url 'https://maven.fabric.io/public' }
  }

  dependencies {
    classpath 'io.fabric.tools:gradle:1.21.4'
  }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

repositories {
  maven { url 'https://jitpack.io' }
  maven { url 'https://maven.fabric.io/public' }
}

dependencies {
  compile('com.crashlytics.sdk.android:crashlytics:2.5.5@aar') {
    transitive = true;
  }
}

我收到错误：

Error:Execution failed for task ':app:fabricGenerateResourcesDebug'.
> Crashlytics Developer Tools error.

有人可以帮忙吗？