Android Question (SOLVED) Firebase Admob problem ErrorCode = 3 EVER


Licensed User
My APP worked correctly until July.
This month I notice a reduction in my income and I began to verify why? and I realize that my ads are not showing what I checked from some phones, from users in different cities.
Can someone tell me if I change something or I have to update something.
This month perform a b4a update from 9.0 to 9.3 by performing all the steps in this tutorial , compile my app and load a PlayStpre and then my problem, I don't know if it's the b4a, the library I use is firebase admob 1.55

When testing with the developer ids that admob provides if it works but with my advertising id not.