Android In-App Billing error You need to sign into your google account

Question

I am implementing in-app purchase using https://github.com/anjlab/android-inapp-billing-v3 . But while in app pop up open it shows \"Error Authentication is required.You nee

Answer 1

Make sure you're logged into the Play Store with the test account. Restart the phone. It should work, at least in my case the restart was necessary.