I used to use IAP 4.11.0 or older version in my game and it worked fine. However recently google send me notice telling me that all Apps should use google billing SDK version 6 or above before the end of 2024 August. I found that I have to update to use IAP 4.12.2. However the initialize always failed after the update, and give me the reason message saying “GoogleBillingResponseCode: FeatureNotSupported”.