Uniti IAP not working

Hello everyone, I have a problem with Unity IAP, everything should work correctly, but there are errors in LogCat (Screenshots below). I have AdMob and Google Play Service installed. I hope for help, I can not decide the second day.

 

This is because you didn't accept the "Upgrade API, make sure you have a backup first" prompt when you imported IAP. This is a known issue, you must click Yes to this dialog when you see it. There is more information here: https://forum.unity.com/threads/iap-troubleshooting-remove-and-reinstall-unity-iap.511747/