Universal Mobile Ads for iOS & Android

Hi there,
I installed the Universal Mobile Ads plugin as well as the gameDNAInstaller and installed all SDKs. However, the build now fails with the error message:
Y:\src\com\epicgames\ue4\GameActivity.java:145: error: package com.google.android.gms.ads does not exist

My config is:

  • UE 4.20.3
  • AndroidWorks 1R6u1
  • Android SDK: Min 16 - Target 25 - 25
  • Android NDK level 19
  • I added Google Play Services as well the other required packages (see attached image)
  • I build with ANT

Any ideas how I can fix this?
Thanks!