Hello, there. I added an AdMob Banner in my screen but it never loads. I am using a test unit ID. When I debug the errorCode and ErrorMessage, it says “3, “No fill.””. I have put my App ID in the Project Settings > Monetization > Google Ads App ID. I am new to Google AdMob. Please help me resolving it.
Error Code 3 (No fill) does not indicate a configuration bug
In Google AdMob, ErrorCode 3 = NO_FILL, this means the AdMob network did not have an ad available to serve at that moment, not that your implementation is broken.
You can read more here
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Can it still be lack of inventory if I am using Test Ad Unit ID?
Due the documentation maybe
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