There is a bug which has not been fixed since build 2014.2429. When trying to initialize Vungle ads, the following error is showing in the app (when compiled and run on the device):
Runtime Error
java.lang.NoClassDefFoundError: com.vungle.publisher.FullScreenAdActivity
Looks as if a class is missing - I filed a bug report under case 35621 a week ago.
Initializing Vungle works fine with build 2014.2428 but any other build > 2428 fails.
Please fix!