Unity Ads doesn't initialize on iOS

Build: currently using Cloud Build for Android and iOS
Unity: 2019.3.5f1
Advertisement 3.4.4

Currently test ads work fine for Android, where the same code does not result in functional behavior on iOS, as in Unity Ads never returns true for isInitialized.

I'm kind of at a loss for what to do next because there are no clear error messages or anything that seems to point a path forward.

One thing I noticed is that in my cloud build log for iOS there are multiple deprecated warnings about Monetization. I only have "using UnityEngine.Advertisements" anywhere in my code:

3627: ▸ ⚠;️ /BUILD_PATH/crustedcakes.word-circle.default-ios/temp20200323-7373-16c6av8/Libraries/com.unity.ads/Plugins/iOS/UnityMonetizationUnityWrapper.m:73:24: 'UnityMonetization' is deprecated: Please use the UnityAds interface [-Wdeprecated-declarations]

my Android build has no references indicating any calls to Monetization and works fine.

 

I had a similar problem. On every build, I was appending to my previous iOS build folder. It got resolved when I deleted the iOS build folder and rebuilt it. Also make sure to see if the "Ads" service in Unity is turned on.