In this post, you’ll learn about the Google Play API Error API_NOT_AVAILABLE and the reason why you are receiving the error message and how to fix it
How does this Google Play Message Look like?
API_NOT_AVAILABLE
Why do you receive this Error in the Google Play Integrity API?
Integrity API is not available. Integrity API is not enabled, or the Play Store version might be old.
How to fix this error?
1) Make sure that Integrity API is enabled in Google Play Console.
2) Ask the user to update Google Play Store.