Millions of real Ad Request，Ad failed to load : 0

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Hello，there are some issues that I tried many times with few days,still I get the log：Ad failed to load : 0. And,that is the same error code with the GP-Release-APK,which has Millions of real Ad Request.
With test Interstitial Ad id：ca-app-pub-3940256099942544/1033173712，I can get the test Ads，and show successfully.But I got the result:Ad failed to load : 0,by just only change the test-ad-id with the Real-Interstitial-Ad-ID.So strange! Please Help!

[Mobile Ads SDK Forum Advisor Prod]

Hi there,

Thank you for reaching out to us.

Could you provide the details below (via Reply privately to author) so that I can investigate the issue?

• Ad unit IDs affected
• Play Store link

Regards,
Ziv Yves Sanchez
Mobile Ads SDK Team

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[Mobile Ads SDK Forum Advisor Prod]

Hi there,

Thank you for providing the requested details in private.

I tested both your app (from the Play Store) and your ad unit ID (with our sample app), and can confirm that I was getting an error code 3 from it, instead of the error code 0 as initially reported. This implies a lack of ads being shown due to a drop in ad inventory.

With this in mind, could you confirm if your account has been fully setup for billing purposes (especially the billing info and address verification sections)? If the issue persists after confirming your account's billing setup, you may then try implementing Mediation in order to help with the filling of ads.

For further ad-serving concerns, you may visit the AdMob Help Center, or consult with our troubleshooter, for further assistance.

Regards,
Ziv Yves Sanchez
Mobile Ads SDK Team

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