Delphi Firemonkey TBannerAd "Message must be shown in the main UI thread" exception


I created a mobile Android application in Delphi 10 Berlin and add TBannerAd at the bottom, according all instructions from Embarcodero website. Set up TBannerAd in test mode and start application on real device. TBAnnerAd showed nothing. On
OnDidFail events it is raised exception “Message must be shown in the main UI thread”
So, to make sure that it is not my code to blame I created empty application with only TBanneAd on it, but result is the same. What else I should check to find the reason?

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