title: Android Studio "ClassNotFoundException" occured while running the project
body: <p>I just start working with the new android studio.But when i run the project it throws an error </p>
  
  <blockquote>
    <p>update failed for AnAction with ID=EditSource: java.lang.ClassNotFoundException: com.android.tools.idea.roots.ui.configuration.GradleProjectSettingsService</p>
  </blockquote>
  
  <p>If any one knows the reason for this exception please help me below is the screen shot<img src="https://i.stack.imgur.com/7g91L.png" alt="Exception">.Thanks in advance</p>