App got crashes on using Prism 9.0.271-pre on app launch

[sunilsolanki-alight]

App got crashes on using Prism 9.0.271-pre on app launch. where as on debugger it works
Fatal Exception: android.runtime.JavaProxyThrowable: [Microsoft.Maui.Controls.InvalidNavigationException]: Expected Navigation Failed. No Root Window has been created.
at Prism.Navigation.PrismWindowManager.CreateWindow()
at Microsoft.Maui.Controls.Application.CreateWindow()
at Microsoft.Maui.Controls.Application.Microsoft.Maui.IApplication.CreateWindow()
at Microsoft.Maui.Platform.ApplicationExtensions.CreatePlatformWindow()
at Microsoft.Maui.MauiAppCompatActivity.OnCreate()
at AlightMobile.MainActivity.OnCreate()
at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_()
at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPL_V()
at crc649435415b1c7c6b8b.MainActivity.n_onCreate(MainActivity.java)
at crc649435415b1c7c6b8b.MainActivity.onCreate(MainActivity.java:39)
at android.app.Activity.performCreate(Activity.java:8129)

[dansiegel]

You have a bug in your code. There are a few ways that you can capture the exception that is causing the initial navigation to fail.

• You can use the GlobalNavigationObserver on the PrismAppBuilder.
• You can provide a callback in NavigateAsync on the NavigationBuilder
• You can await the Navigation and evaluate the INavigationResult

public static MauiApp CreateMauiApp() =>
    MauiApp.CreateBuilder()
            .UseMauiApp<App>()
            .UsePrism(prism => prism
                .AddGlobalNavigationObserver(context => context.Subscribe(x =>
                {
                    // This uses Prism.Maui.Rx
                    if (x.Type == NavigationRequestType.Navigate)
                        Console.WriteLine($"Navigation: {x.Uri}");
                    else
                        Console.WriteLine($"Navigation: {x.Type}");

                    var status = x.Cancelled ? "Cancelled" : x.Result.Success ? "Success" : "Failed";
                    Console.WriteLine($"Result: {status}");

                    if (status == "Failed" && !string.IsNullOrEmpty(x.Result?.Exception?.Message))
                        Console.Error.WriteLine(x.Result.Exception.Message);
                }))
                .OnAppStart(navigationService => navigationService.CreateBuilder()
                    .AddSegment<SplashPageViewModel>()
                    .NavigateAsync(HandleNavigationError))
            )
            .ConfigureFonts(fonts =>
            {
                fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
            })
            .Build();



    private static void HandleNavigationError(Exception ex)
    {
        Console.WriteLine(ex);
        System.Diagnostics.Debugger.Break();
    }