滑块控件基于Slider_ValueChanged上的值错误更新标签

问：

试图做一些超级简单的事情，但我没有得到它。对这个编程的东西有点陌生。我有一个滑块控件。我有两个标签。一个 我已绑定到滑块的值以显示所选值。我还有另一个标签，我有措辞。如果滑块值为 1，我希望它显示“玩家”。如果它大于 1，我希望它说“玩家”

  <Viewbox Grid.Column="1" Margin="10">
  <Slider x:Name="sliderhunter" Minimum  = "1" Maximum = "8" Width="200" TickFrequency = "1" Value="2" 
   TickPlacement = "BottomRight" ValueChanged = "sliderhunter_ValueChanged" Margin = "10" IsMoveToPointEnabled="True" IsSnapToTickEnabled="True"/>


  </Viewbox>
  <TextBox Grid.Column="1" IsHitTestVisible="False"  Foreground="White" Text="{Binding Value, ElementName=sliderhunter, UpdateSourceTrigger=PropertyChanged}" TextAlignment="Left" Height="68" VerticalAlignment="Top" FontSize="50" Background="Transparent" HorizontalContentAlignment="Left" BorderBrush="Transparent" Margin="43,34,469,0" />
  <Label Grid.Column="1" IsHitTestVisible="False" x:FieldModifier="Public"   Content="Hunters" HorizontalContentAlignment="Left" Height="80" VerticalAlignment="Top" FontSize="50" Background="Transparent" BorderBrush="Transparent" Margin="95,34,343,0" x:Name="txtHunter" />
               

还有我背后的简单代码。

  Private Sub sliderhunter_ValueChanged(sender As Object, e As RoutedPropertyChangedEventArgs(Of Double)) Handles sliderhunter.ValueChanged
        If e.NewValue > 1 Then

            txtHunter.Content = "Players"
        Else
            txtHunter.Content = "Player"
        End If

    End Sub

它被挂在另一个上，并带有“对象引用未设置为对象的实例”。我也不明白。我将值设置为 2，因此其他值甚至不应该进入其中。我花了两个小时来讨论这个问题。如果您能提供帮助，请在解释中使用蜡笔。就像我说的，仍然在努力学习所有这些东西。

@emoacht

System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=GameProject
  StackTrace:
   at GameProject.winSetGameSettings.sliderhunter_ValueChanged(Object sender, RoutedPropertyChangedEventArgs`1 e) in C:\Users\mgobl\source\repos\GameScoreBoard\GameScoreboard\winSetGameSettings.xaml.vb:line 2571

这是错误屏幕：