mainmapview.xaml
```
<?xml version="1.0" encoding="utf-8" ?>
<ContentView xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="iChat.MainMapView"
xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Maui;assembly=Esri.ArcGISRuntime.Maui"
xmlns:esriTK="clr-namespace:Esri.ArcGISRuntime.Toolkit.Maui;assembly=Esri.ArcGISRuntime.Toolkit.Maui"
xmlns:local="clr-namespace:iChat">
<Grid>
<esriUI:MapView x:Name="ArcGisMapView" Map="{Binding Map}" Margin="0,0,0,-22" IsVisible="{Binding IsMapViewVisible}"/>
<esriUI:SceneView x:Name="ArcGisSceneView" Scene="{Binding Scene}" Margin="0,0,0,-22" IsVisible="{Binding IsSceneViewVisible}"/>
<esriTK:Compass x:Name="MapViewCompass" GeoView="{Binding Source={x:Reference=ArcGisMapView}}" AutoHide="False" />
<!-- 在 Grid 的右上角添加一个切换按钮 -->
<Button Text="{Binding ToggleCommandText}" Command="{Binding ToggleViewCommand}"
HorizontalOptions="End" VerticalOptions="Start"
Margin="0,10,10,0" WidthRequest="60" HeightRequest="30"/>
<!-- 加载动画 -->
<ActivityIndicator x:Name="LoadingIndicator"
IsRunning="{Binding IsLoading}"
IsVisible="{Binding IsLoading}"
HorizontalOptions="CenterAndExpand"
VerticalOptions="CenterAndExpand" />
</Grid>
</ContentView>
If I remove line "<esriTK:Compass x:Name="MapViewCompass" GeoView="{Binding Source={x:Reference=ArcGisMapView}}" AutoHide="False" />" , it can work normally.
I already installed the nuget package Esri.ArcGISRuntime.Toolkit.Maui, why I got this error message:Handler not found for view Esri.ArcGISRuntime.Toolkit.Maui.Compass.
