Flutter Not all asset views lie inside the native ad view

I was trying to add an native admob to my flutter app.
I completed adding admob account and ad unit.
so I got this result.

I think this is not completed. And I found one log.

I/Ads     (11192): Received log message: <Google:HTML> Not all asset views lie inside the native ad view. This indicates an integration problem. Such implementations will not be supported in the future. Please make sure that all native ad assets are rendered inside the native ad view.

The code of this native admob is here.

class MatchingPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {

    final ad_id = 'my admob ad id';

    return Scaffold(
      appBar: CommonAppBar(text: '매칭'),
      body: Center(
        child: Column(
          children: <Widget>[
            Container(
              height: 60,
              child: NativeAdmob(
                adUnitID: ad_id
              ),
            ),
            Expanded(
              child: Container(),
            ),
            CircularProgressIndicator(),
            SizedBox(
              height: 30,
            ),
            Text(
              '예상 대기시간 60초',
              style: TextStyle(color: Colors.white, fontSize: 16),
            ),
            Text(
              '???초 경과',
              style: TextStyle(color: Colors.white, fontSize: 16),
            ),
            Expanded(
              child: Container(),
            ),
            CommonButton(
              text: 'STOP!',
              onPressed: () {},
            )
          ],
          crossAxisAlignment: CrossAxisAlignment.center,
          mainAxisAlignment: MainAxisAlignment.center,
        ),
      ),
    );
  }
}