Unity: 2018.4.30 IAP Package: 2.0.6 Build local, deploy to Google Play Games, and IAP works as expected. Exact same repo, built using Unity Cloud Build, deploy to Google Play Games, IAP fails. Appears to be exception in the InitializePurchasing boilerplate on this line: var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance()); Seems to have been some discussion of IAP and Unity Cloud Build issues years ago, and I tried the suggestions I found: 1. define UNITY_PURCHASING 2. re-import IAP package 3. Disable then Re-enable IAP But same results. It seems this must be a build problem with Unity Cloud Build and IAP, or I've configured something incorrectly. Everything else works on the Unity Cloud Build version, such as logging into Google Play Games. The work-around is to just make the build locally, but this messes up the automation process we have. Would really like to get to the bottom of this.