Hi Robin,
I'm running into an issue where I can't seem to build an APK due to the Unity Ads extension. When I turn off the Unity Ads extension and take out the blocks, the APK builds fine.
From my logs:
[haxelib] [proguard] Warning: com.unity3d.ads.android.webapp.UnityAdsWebBridge: can't find referenced class android.webkit.JavascriptInterface
[haxelib] [proguard] Note: com.unity3d.ads.android.data.UnityAdsAdvertisingId: can't find dynamically referenced class com.google.android.gms.common.GooglePlayServicesUtil
[haxelib] [proguard] Note: com.unity3d.ads.android.data.UnityAdsAdvertisingId: can't find dynamically referenced class com.google.android.gms.ads.identifier.AdvertisingIdClient
[haxelib] [proguard] Note: com.unity3d.ads.android.data.UnityAdsAdvertisingId: can't find dynamically referenced class com.google.android.gms.ads.identifier.AdvertisingIdClient$Info
[haxelib] [proguard] Note: com.unity3d.ads.android.unity3d.UnityAdsUnityWrapper: can't find dynamically referenced class com.unity3d.player.UnityPlayer
[haxelib] [proguard] Note: the configuration refers to the unknown class 'com.google.vending.licensing.ILicensingService'
[haxelib] [proguard] Note: the configuration refers to the unknown class 'com.android.vending.licensing.ILicensingService'
[haxelib] [proguard] Note: there were 2 references to unknown classes.
[haxelib] [proguard] You should check your configuration for typos.
[haxelib] [proguard] Note: there were 4 unresolved dynamic references to classes or interfaces.
[haxelib] [proguard] You should check if you need to specify additional program jars.
[haxelib] [proguard] Warning: there were 1 unresolved references to classes or interfaces.
[haxelib] [proguard] You may need to specify additional library jars (using '-libraryjars')
EDIT: I made
a post in the Bugs section of the forum and included the full logs, if that helps.
2ND EDIT: Problem solved by updating the Android SDK and installing the Android SDK for pretty much every version. Thanks Robin!