title: Error:(18, 0) Plugin with id 'io.fabric' not found
body: <p>Fabric was successfully working on my project. On some day suddenly it started giving me error "<code>Error:(18, 0) Plugin with id 'io.fabric' not found</code>". I checked everything, but it was correctly integrated. Please help and give solution</p>
  
  <p>Outer build.gradle</p>
  
  <pre><code>    buildscript {
      repositories {
          maven { url 'https://maven.fabric.io/public' }
      }
  
      dependencies {
  
          classpath 'io.fabric.tools:gradle:1.+'
      }
  }
  </code></pre>
  
  <p>Inner build.gradle</p>
  
  <pre><code>    apply plugin: 'com.android.application'
      apply plugin: 'io.fabric'
  
      repositories {
         maven { url 'https://maven.fabric.io/public' }
      }
  
      dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
  
      compile('com.crashlytics.sdk.android:crashlytics:2.6.7@aar') {
          transitive = true;
      }
  
     }
  
  apply plugin: 'com.google.gms.google-services'
  </code></pre>