[Bug] Popup throws exception when called from OnAppearing()

Description

We are able to open a Popup control from a command on the ViewModel, as well as from a button clicked event. However, when calling this.ShowPopup(popup) from the ContentPage OnAppearing() method, an exception is thrown as follows:

System.InvalidOperationException: Could not locate MauiContext at CommunityToolkit.Maui.Views.PopupExtensions.CreatePopup(Page page, Popup popup) at CommunityToolkit.Maui.Views.PopupExtensions.ShowPopup[AlertPopup](Page page, AlertPopup popup)

We have only tested Android so far.

Stack Trace

at CommunityToolkit.Maui.Views.PopupExtensions.CreatePopup(Page page, Popup popup) at CommunityToolkit.Maui.Views.PopupExtensions.ShowPopup[AlertPopup](Page page, AlertPopup popup) at MiX.Amaza.Mobile.BaseApp.Pages.Profile.ProfilePage.OnAppearing() in C:\git\Amaza\MiX.Amaza.Mobile.BaseApp\Pages\Profile\ProfilePage.xaml.cs:line 33 at Microsoft.Maui.Controls.Page.SendAppearing() in D:\a\_work\1\s\src\Controls\src\Core\Page.cs:line 485 at Microsoft.Maui.Controls.ShellContent.SendPageAppearing(Page page) in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellContent.cs:line 150 at Microsoft.Maui.Controls.ShellContent.SendAppearing() in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellContent.cs:line 131 at Microsoft.Maui.Controls.ShellContent.OnChildAdded(Element child) in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellContent.cs:line 161 at Microsoft.Maui.Controls.ShellContent.set_ContentCache(Page value) in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellContent.cs:line 202 at Microsoft.Maui.Controls.ShellContent.Microsoft.Maui.Controls.IShellContentController.GetOrCreateContent() in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellContent.cs:line 81 at Microsoft.Maui.Controls.Platform.Compatibility.ShellSectionRenderer.OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) in D:\a\work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellSectionRenderer.cs:line 122 at AndroidX.Fragment.App.Fragment.n_OnCreateView_Landroid_view_LayoutInflater_Landroid_view_ViewGroup_Landroid_os_Bundle(IntPtr jnienv, IntPtr native__this, IntPtr native_inflater, IntPtr native_container, IntPtr native_savedInstanceState) in C:\a\_work\1\s\generated\androidx.fragment.fragment\obj\Release
et6.0-android\generated\src\AndroidX.Fragment.App.Fragment.cs:line 1999 at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPLLL_L(_JniMarshal_PPLLL_L callback, IntPtr jnienv, IntPtr klazz, IntPtr p0, IntPtr p1, IntPtr p2) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:line 352

Code

AlertPopup.cs

public class AlertPopup : Popup
	{
		public AlertPopup() : base()
		{
			Content = new VerticalStackLayout
			{
				Children =
				{
						new Label
						{
								Text = "This is a very important message!"
						}
				}
			};
		}
	}

ProfilePage.xaml.cs

public partial class ProfilePage : ContentPage
{
	public ProfilePage() : base()
	{
		InitializeComponent();
	}

	protected override void OnAppearing()
	{
		base.OnAppearing();
		try
		{
			var popup = new AlertPopup();
			// This is where the exception is thrown
			this.ShowPopup(popup);
		}
		catch (Exception ex)
		{
			throw;
		}
	}
}

Basic Information

• Version with issue: 1.0.0
• IDE: Microsoft Visual Studio Professional 2022 (64-bit) - Preview Version 17.3.0 Preview 1.1

[mariusmcalpine]

Works like a charm.

protected override void OnHandlerChanged()
    {
        base.OnHandlerChanged();

        var popup = new SimplePopupCS();
        this.ShowPopup(popup);
    }

Thanks @pictos @VladislavAntonyuk

[VladislavAntonyuk]

You can override OnHandlerChanged. Without subscription OnAppearing