.Net Maui, The app is not working in Release mode but working in Debug Mode

[Nandulucky]

I am Migrating Xamarin forms into Maui, I am using Prism but I am unable to run the app in release mode
I am facing the error is

*** Terminating app due to uncaught exception 'Microsoft.Maui.Controls.InvalidNavigationException', reason: 'Expected Navigation Failed. No Root Window has been created. (Microsoft.Maui.Controls.InvalidNavigationException)
at Prism.Navigation.PrismWindowManager.CreateWindow(Application app, IActivationState activationState)

Already I created CreateWindow in Mauiprogram.cs file

          .CreateWindow(async (container, navigation) =>
                  {
                    try
                      {
                          if (VersionTracking.IsFirstLaunchEver && !AppConstants.IsLoggedInUser && !Convert.ToBoolean(await 
                          SecureStorage.GetAsync(AppConstants.ShowBiometricConsent).ConfigureAwait(false)))
                          {
                         AppConstants.IsLoggedInUser = true;
                         SecureStorage.RemoveAll();
                         await SecureStorage.SetAsync(AppConstants.LoggedIn, AppConstants.False);
                         await SecureStorage.SetAsync(AppConstants.LoggedOut, AppConstants.True);
                         await SecureStorage.SetAsync(AppConstants.ShowBiometricConsent, AppConstants.True);
                         await SecureStorage.SetAsync(AppConstants.ShowNotificationOptions, AppConstants.True);

                         await Theme.SetTheme();

                         await ClearLoginCredentials();

                         await navigation.NavigateAsync(AppConstants.LoginPage);
                     }
                     else
                     {
                         await Theme.SetTheme().ConfigureAwait(false);

                         var isLoggedOut = Convert.ToBoolean(await SecureStorage.GetAsync(AppConstants.LoggedOut).ConfigureAwait(false));

                         if (isLoggedOut)
                         {
                             await ClearLoginCredentials();
                             await SecureStorage.SetAsync(AppConstants.LoggedIn, AppConstants.False).ConfigureAwait(false);
                             await navigation.NavigateAsync(AppConstants.LoginPage).ConfigureAwait(false);
                         }
                         else
                         {
                             await navigation.NavigateAsync(AppConstants.MainPage);
                         }
                     }

                     Profile.ProfileImage = null;
                     Barrel.ApplicationId = Configurations.ClientID;
                 }
                 catch (Exception ex)
                 {
                     Crashes.TrackError(ex);
                 }
             });

How can I fix this issue? In release mode app is installing and when it opens app, the app is crash with the error No Root Window has been created
I am using the prism packages are
<PackageReference Include="Prism.Container.DryIoc" Version="9.0.107" /> <PackageReference Include="Prism.Core" Version="9.0.537" /> <PackageReference Include="Prism.DryIoc.Maui" Version="9.0.537" />

Please suggest how can fix?

[PauchardThomas]

Same, any help ?

[AngeloLazzari]

Hi, which is the value of AppConstants.MainPage or AppConstants.LoginPage during the call?
Do they have the "/" char? did you try to force, for example "/MainPage" or "/LoginPage"

[LeoJHarris]

Reproducible as described.

@brianlagunas @dansiegel is this something we can have investigated?

Logcat provides the following Stacktrace for the following.

.UsePrism(prismAppBuilder =>
{
    prismAppBuilder.RegisterTypes(containerRegistry =>
    {
        registerPages(containerRegistry);
        registerCustomServices(containerRegistry);
        registerMauiCoreServices(containerRegistry);
        registerEssentials(containerRegistry);
    }).CreateWindow(async (navigationService) => await navigationService.NavigateAsync($"{nameof(NavigationPage)}/{PageNames.GettingStartedPage}").ConfigureAwait(true));
})

10-31 14:20:31.006  6069  6069 E MainActivity: Exception in OnCreate: Microsoft.Maui.Controls.InvalidNavigationException: Expected Navigation Failed. No Root Window has been created.
10-31 14:20:31.006  6069  6069 E MainActivity:    at Prism.Navigation.PrismWindowManager.CreateWindow(Application app, IActivationState activationState)
10-31 14:20:31.006  6069  6069 E MainActivity:    at Microsoft.Maui.Controls.Application.CreateWindow(IActivationState activationState)
10-31 14:20:31.006  6069  6069 E MainActivity:    at SampleApp.App.CreateWindow(IActivationState activationState)
10-31 14:20:31.006  6069  6069 E MainActivity:    at Microsoft.Maui.Controls.Application.Microsoft.Maui.IApplication.CreateWindow(IActivationState activationState)
10-31 14:20:31.006  6069  6069 E MainActivity:    at Microsoft.Maui.Platform.ApplicationExtensions.CreatePlatformWindow(Activity activity, IApplication application, Bundle savedInstanceState)
10-31 14:20:31.006  6069  6069 E MainActivity:    at Microsoft.Maui.MauiAppCompatActivity.OnCreate(Bundle savedInstanceState)
10-31 14:20:31.006  6069  6069 E MainActivity:    at SampleApp.MainActivity.OnCreate(Bundle bundle)
10-31 14:20:31.020  1317  1426 I VSyncReactor: Current= 60, Period= 60, hwcPeriod= 60
10-31 14:20:31.020  6069  6069 D AndroidRuntime: Shutting down VM
10-31 14:20:31.020  6069  6069 E AndroidRuntime: FATAL EXCEPTION: main
10-31 14:20:31.020  6069  6069 E AndroidRuntime: Process: ##########, PID: 6069
10-31 14:20:31.020  6069  6069 E AndroidRuntime: android.runtime.JavaProxyThrowable: [Microsoft.Maui.Controls.InvalidNavigationException]: Expected Navigation Failed. No Root Window has been created.
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at Prism.Navigation.PrismWindowManager.CreateWindow(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at Microsoft.Maui.Controls.Application.CreateWindow(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at SampleApp.App.CreateWindow(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at Microsoft.Maui.Controls.Application.Microsoft.Maui.IApplication.CreateWindow(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at Microsoft.Maui.Platform.ApplicationExtensions.CreatePlatformWindow(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at Microsoft.Maui.MauiAppCompatActivity.OnCreate(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at SampleApp.MainActivity.OnCreate(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPL_V(Unknown Source:0)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at crc641b109f8ad35faaaf.MainActivity.n_onCreate(Native Method)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at crc641b109f8ad35faaaf.MainActivity.onCreate(MainActivity.java:69)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.Activity.performCreate(Activity.java:8975)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.Activity.performCreate(Activity.java:8944)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1456)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4146)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4322)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:139)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:106)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.os.Looper.loopOnce(Looper.java:230)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:319)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:8919)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
10-31 14:20:31.020  6069  6069 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)

[dansiegel]

@LeoJHarris if you would like to purchase a support contract I would be happy to prioritize issues for you, otherwise we get to issues as we have time.

That said this particular problem is occurring because your navigation failed. Your real struggle is that you haven't set up any code to identify what happened and evaluate the error. You might start by doing something like we have in the playground app, or you could get the result from that navigation and evaluate it when the Exception is not null. It could very well be that your real issue is that a service was not registered in a release build. Similarly it could be that there is a problem occurring in Release because you have linking enabled which is preventing a service from being created by DI in Release.

Prism/e2e/Maui/PrismMauiDemo/MauiProgram.cs

Lines 28 to 40 in 0ea820c

	.AddGlobalNavigationObserver(context => context.Subscribe(x =>
	{
	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);
	}))

[LeoJHarris]

@dansiegel Understood. In any event I've got a bit more of Stacktrace that might be helpful, I will do some of my own digging on this as well.

11-01 09:28:46.844 30561 30561 I MonoDroid: Java.Lang.RuntimeException: Unable to start activity ComponentInfo{########/crc641b109f8ad35faaaf.MainActivity}: java.lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:  ---> Java.Lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Java.Interop.JniEnvironment.InstanceMethods.CallIntMethod(JniObjectReference instance, JniMethodInfo method, JniArgumentValue* args)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Java.Interop.JniPeerMembers.JniInstanceMethods.InvokeAbstractInt32Method(String encodedMember, IJavaPeerable self, JniArgumentValue* parameters)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at AndroidX.Fragment.App.BackStackRecord.Commit()
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Platform.NavigationRootManager.<>c__DisplayClass26_0.<SetContentView>b__1(FragmentManager fm)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Platform.FragmentManagerExtensions.RunOrWaitForResume(FragmentManager obj, Context context, Action`1 onResume)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Platform.NavigationRootManager.SetContentView(IView view)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Platform.NavigationRootManager.Connect(IView view, IMauiContext mauiContext)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Handlers.WindowHandler.CreateRootViewFromContent(IWindowHandler handler, IWindow window)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Handlers.WindowHandler.MapContent(IWindowHandler handler, IWindow window)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.PropertyMapper`2.<>c__DisplayClass5_0[[Microsoft.Maui.IWindow, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Handlers.IWindowHandler, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].<Add>b__0(IElementHandler h, IElement v)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Platform.ElementExtensions.SetHandler(Context nativeElement, IElement element, IMauiContext context)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Platform.ElementExtensions.SetWindowHandler(Activity platformWindow, IWindow window, IMauiContext context)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.Platform.ApplicationExtensions.CreatePlatformWindow(Activity activity, IApplication application, Bundle savedInstanceState)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Microsoft.Maui.MauiAppCompatActivity.OnCreate(Bundle savedInstanceState)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at SampleApp.MainActivity.OnCreate(Bundle bundle)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_(IntPtr jnienv, IntPtr native__this, IntPtr native_savedInstanceState)
11-01 09:28:46.844 30561 30561 I MonoDroid:    at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPL_V(_JniMarshal_PPL_V callback, IntPtr jnienv, IntPtr klazz, IntPtr p0)
11-01 09:28:46.844 30561 30561 I MonoDroid:   --- End of managed Java.Lang.IllegalStateException stack trace ---
11-01 09:28:46.844 30561 30561 I MonoDroid: java.lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.FragmentManager.enqueueAction(FragmentManager.java:1897)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commitInternal(BackStackRecord.java:342)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commit(BackStackRecord.java:306)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.n_onCreate(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.onCreate(MainActivity.java:69)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8975)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8944)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1456)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4146)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4322)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:139)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Handler.dispatchMessage(Handler.java:106)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loopOnce(Looper.java:230)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loop(Looper.java:319)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.main(ActivityThread.java:8919)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at java.lang.reflect.Method.invoke(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
11-01 09:28:46.844 30561 30561 I MonoDroid:
11-01 09:28:46.844 30561 30561 I MonoDroid:   --- End of managed Java.Lang.IllegalStateException stack trace ---
11-01 09:28:46.844 30561 30561 I MonoDroid: java.lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.FragmentManager.enqueueAction(FragmentManager.java:1897)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commitInternal(BackStackRecord.java:342)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commit(BackStackRecord.java:306)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.n_onCreate(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.onCreate(MainActivity.java:69)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8975)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8944)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1456)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4146)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4322)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:139)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Handler.dispatchMessage(Handler.java:106)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loopOnce(Looper.java:230)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loop(Looper.java:319)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.main(ActivityThread.java:8919)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at java.lang.reflect.Method.invoke(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
11-01 09:28:46.844 30561 30561 I MonoDroid:
11-01 09:28:46.844 30561 30561 I MonoDroid:    --- End of inner exception stack trace ---
11-01 09:28:46.844 30561 30561 I MonoDroid:
11-01 09:28:46.844 30561 30561 I MonoDroid:   --- End of managed Java.Lang.RuntimeException stack trace ---
11-01 09:28:46.844 30561 30561 I MonoDroid: java.lang.RuntimeException: Unable to start activity ComponentInfo{########/crc641b109f8ad35faaaf.MainActivity}: java.lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4164)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4322)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:139)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Handler.dispatchMessage(Handler.java:106)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loopOnce(Looper.java:230)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loop(Looper.java:319)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.main(ActivityThread.java:8919)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at java.lang.reflect.Method.invoke(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
11-01 09:28:46.844 30561 30561 I MonoDroid: Caused by: java.lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.FragmentManager.enqueueAction(FragmentManager.java:1897)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commitInternal(BackStackRecord.java:342)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commit(BackStackRecord.java:306)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.n_onCreate(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.onCreate(MainActivity.java:69)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8975)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8944)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1456)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4146)
11-01 09:28:46.844 30561 30561 I MonoDroid:     ... 12 more
11-01 09:28:46.844 30561 30561 I MonoDroid:
11-01 09:28:46.844 30561 30561 I MonoDroid:   --- End of managed Java.Lang.RuntimeException stack trace ---
11-01 09:28:46.844 30561 30561 I MonoDroid: java.lang.RuntimeException: Unable to start activity ComponentInfo{########/crc641b109f8ad35faaaf.MainActivity}: java.lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4164)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4322)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:139)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Handler.dispatchMessage(Handler.java:106)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loopOnce(Looper.java:230)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.os.Looper.loop(Looper.java:319)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.main(ActivityThread.java:8919)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at java.lang.reflect.Method.invoke(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
11-01 09:28:46.844 30561 30561 I MonoDroid: Caused by: java.lang.IllegalStateException: FragmentManager has not been attached to a host.
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.FragmentManager.enqueueAction(FragmentManager.java:1897)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commitInternal(BackStackRecord.java:342)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at androidx.fragment.app.BackStackRecord.commit(BackStackRecord.java:306)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.n_onCreate(Native Method)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at crc641b109f8ad35faaaf.MainActivity.onCreate(MainActivity.java:69)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8975)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Activity.performCreate(Activity.java:8944)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1456)
11-01 09:28:46.844 30561 30561 I MonoDroid:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4146)
11-01 09:28:46.844 30561 30561 I MonoDroid:     ... 12 more
11-01 09:28:46.844 30561 30561 I MonoDroid:
11-01 09:28:46.846  1553 30932 I DropBoxManagerService: add tag=data_app_crash isTagEnabled=true flags=0x2
11-01 09:28:46.846  1553  4066 D Debug   : low && ship && 3rdparty app crash, do not dump
11-01 09:28:46.846  1553 30933 W ActivityManager: crash : ########,10502

[dansiegel]

again... you're looking in the wrong place. Look at the Navigation Result. It will show you the actual exception that is occurring. It should be a NavigationException which we try to give you a meaningful error message to point you in the right direction. If you have an InnerException that is a ContainerResolutionException you can call GetErrors() to get a mapped error collection that gives you correlation between types that were resolved and the error(s) that were encountered or you can call GetRootException() which uses some logic to attempt to get you closer to the real error.

[LeoJHarris]

Thanks @dansiegel for your guidance, I'm looping back to this problem I found out the inner exception of the NavigationException is a ViewCreationException, the message from the exception is simply Unable to create Page 'LandingTabbedPage'.

I am continuing to work through this but seems disabling r8 is the current work around for me.

[LeoJHarris]

Having gotten a little further on this there seem to be a few MAUI core components getting stripped out with r8, in fact I opened a ticket on this last year dotnet/maui#25142. Ill follow up directly on the MAUI repo as these issues seem better reported them.