title: GOOGLE PLAY SERVICES EXCEPTION: com.google.android.gms.common.GooglePlayServicesUtil
body: <p>I am trying to integrate Google Play Games into my app. It is currently working in debug mode. However, it does not seem to work in release mode. I am getting errors. I tried clean and rebuild.</p>
  
  <blockquote>
    <p>java.lang.RuntimeException: Unable to get provider com.google.android.gms.measurement.AppMeasurementContentProvider: java.lang.ClassNotFoundException</p>
  </blockquote>
  
  <p>And then this one:</p>
  
  <blockquote>
    <p>GOOGLE PLAY SERVICES EXCEPTION: com.google.android.gms.common.GooglePlayServicesUtil</p>
  </blockquote>
  
  <p>Followed by this one:</p>
  
  <blockquote>
    <p>There is a problem with the Google Play Services library, which is
    required for Android Advertising ID support. The Google Play Services
    library should be integrated in any app shipping in the Play Store
    that uses analytics or advertising.</p>
  </blockquote>
  
  <p>What could be wrong? I tried experimenting with Gradle, but no luck yet.</p>
  
  <p>If I disable Proguard, it works! This seems to be a known issue, but not resolved yet. Any ideas?</p>