googleads-mobile-flutter: [IOS] LoadAdError code: 1, domain: com.google.admob, message: Request Error: No ad to show.

Hi, I have implemented the Flutter google_mobile_ads: ^1.0.0 . The test Ad Units are showing fine in the App (debug mode), but the real Ad Units, once the App has been built and deployed in Test Flight (iOS) are not showing at all. In the console I get this error:

flutter: Ad failed to load: LoadAdError(code: 1, domain: com.google.admob, message: Request Error: No ad to show., responseInfo: ResponseInfo(responseId: null, mediationAdapterClassName: null, adapterResponses: []))

What I checked:

• Real Ad Units Ids are correct
• The GADApplicationIdentifier is correct
• I have filled all the information requested in the Payment section (AdMob), except for the Payment Method (I can’t add it yet, current balance < 10 dollars)

What should I do?

Plugin Version

google_mobile_ads: ^1.0.0

Steps to Reproduce

1. Create a banner Ad Unit (more than 24 hours ago)
2. Add it in a flutter widget (main screen)
3. Make sure you have updated the Info.plist file with the pub id (related to your admob account)

Expected results: AdMob banner is working and rendering

Actual results: AdMob banner is not working and is not rendering

flutter: Ad failed to load: LoadAdError(code: 1, domain: com.google.admob, message: Request Error: No ad to show., responseInfo: ResponseInfo(responseId: null, mediationAdapterClassName: null, adapterResponses: []))