German Ortiz

Thank you for the tip.! Just curious, in future WinUI3 Window implementations, we will have to implement this event as an extension, as you suggested?

But not Window.Closing... [Window Events](https://docs.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.window?view=windows-app-sdk-1.1#events)

Facing same issue after upgrading to 1.1.1. 

I'm still facing this error in 1.1.2 (0x8000FFFF). Is there anything I can do to help to solve this? Log something, try without signing...

Well, now it is working. What happened: - I tried to install the x86 version of the package - In the process, the Microsoft Store showed a popup saying the...

With the help of @castorix and @yvlawy, I finally solved this issue: In the App.OnLaunched event, I added this: protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args) { mainWindow = new MainWindow() {...