MAUI .NullReferenceException (Native iOS QLPreviewController)

I am having a problem running after through the QLPreviewController interface.

view.PushViewController(previewController, true);

QLPreviewController starts up and displays what it should. At this point,

UIApplication.Main(args, null, typeof(AppDelegate));

throws an error

{System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Maui.Controls.Handlers.Compatibility.NavigationRenderer.SecondaryToolbar.LayoutToolbarItems(NFloat toolbarWidth, NFloat toolbarHeight, NFloat padding)
at Microsoft.Maui.Controls.Handlers.Compatibility.NavigationRenderer.SecondaryToolbar.LayoutSubviews()
at UIKit.UIApplication.UIApplicationMain(Int32 argc, String\[\] argv, IntPtr principalClassName, IntPtr delegateClassName)
at UIKit.UIApplication.Main(String\[\] args, Type principalClass, Type delegateClass)
at MAUISample.Program.Main(String\[\] args) in ...MAUISampleProject}

Does anyone know how to fix it or what I might be doing wrong ?

Greetings Matlas

I also tried to open the pdf file through UIDocumentInteractionController. The problem looks the same the file opens but the same error is thrown.

Referencing this question solved the issue for me for MAUI iOS .NET 8.0.1: How to find current UIViewController in Xamarin

public async Task<string> SaveFileAsync(byte[] content, string localFilename)
{
   string documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
   string filePath = Path.Combine(documentsPath, localFilename);
   await File.WriteAllBytesAsync(filePath, content); // writes to local storage
   return filePath;
}

public void OpenPdf(string filePath)
{
    string documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
    var PreviewController = UIDocumentInteractionController.FromUrl(NSUrl.FromFilename(filePath));
    var vc = GetTopViewController();
    PreviewController.Delegate = new PDFViewer(vc);
    PreviewController.PresentPreview(true);
}

public static UIViewController GetTopViewController()
{
    var window = UIApplication.SharedApplication.KeyWindow;
    var vc = window.RootViewController;
    while (vc.PresentedViewController != null)
        vc = vc.PresentedViewController;
    if (vc is UINavigationController navController)
        vc = navController.ViewControllers.Last();
    return vc;
}

public class PDFViewer : UIDocumentInteractionControllerDelegate
{
    UIViewController ownerVC;

    public PDFViewer(UIViewController vc)
    {
        ownerVC = vc;
    }

    public override UIViewController ViewControllerForPreview(UIDocumentInteractionController controller)
    {
        return ownerVC;
    }

    public override UIView ViewForPreview(UIDocumentInteractionController controller)
    {
        return ownerVC?.View ?? new UIView();
    }
}