I am using Admob SDK to load banner ads from DFP on Android.
I am using the XML method as defined in this page to load up the ads: https://developers.google.com/mobile-ads-sdk/docs/dfp/fundamentals
When I run the apps, I get
06-21 16:44:30.354: I/Ads(2641): onFailedToReceiveAd(Invalid Ad request.)
When I change to testing mode by
adRequest.addTestDevice("xxx");
Then I can see the Google Test banner successfully. So assume my SDK integration is correct, what the heck if the "Invalid Ad request"?