我试图实现一个Admob横幅到一个应用程序与多任务启用，但我得到这个错误：

<Google> Invalid Request. The GADRequest scene property should be set for
applications that support multi-scene. Treating the unset property as an error
while in test mode.

如果有人知道如何在多任务应用程序中成功实现Admob横幅，请帮助我
我在编写viewDidApper函数的代码时遇到了问题。
我已有的代码：

var interstitial: GADInterstitial!

func loadInterstitial() {
   let request = GADRequest()
   request.scene = view.window?.windowScene
   interstitial.load(request)
}

func loadBannerAd() {
   let bannerWidth = view.frame.size.width

   bannerView.adSize = GADCurrentOrientationAnchoredAdaptiveBannerAdSizeWithWidth(bannerWidth)

   let request = GADRequest()
   request.scene = view.window?.windowScene
   bannerView.load(request)
}

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
   coordinator.animate(alongsideTransition: nil) { context in
       self.loadBannerAd()
   }
}

override func viewDidLoad() {
   super.viewDidLoad()

   bannerView = GADBannerView(adSize: kGADAdSizeBanner)

   addBannerViewToView(bannerView)
   bannerView.adUnitID = "ca-app-pub-3940256099942544/2934735716"
   bannerView.rootViewController = self
   bannerView.load(GADRequest())
   bannerView.delegate = self
}