Avalonia UserControl in Browser don't work

[Makstvell]

When I start the application on Desktop - all right. But when I start on WebAssembly sever - No;

My own user controls on browser web assembly - don't work.

But on desktop - work.

But one moment - it is work but when I click to button - error

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<Paginator:Paginator Grid.Row="7" Grid.Column="0" Grid.ColumnSpan="5" PageCount="{Binding PageCountP}" CurrentPage="{Binding CurrentPageP}"></Paginator:Paginator>

Desktop:

Web:

using Avalonia;
using Avalonia.Controls;
using Avalonia.Data;
using ReactiveUI;
using System.Diagnostics;
using System.Reactive;
using System.Threading.Tasks;

namespace Application_EKP.Paginator
{
    public partial class Paginator : UserControl
    {

        public static readonly AvaloniaProperty<int> PageCountProperty =
            AvaloniaProperty.Register<Paginator, int>(nameof(PageCount),1, defaultBindingMode: BindingMode.TwoWay);

        public int PageCount
        {
            get => (int)GetValue(PageCountProperty);
            set
            {
                SetValue(PageCountProperty, value);
                CheackIfNormalValue();
            }
        }



        public static readonly AvaloniaProperty<int> CurrentPageProperty =
            AvaloniaProperty.Register<Paginator, int>(nameof(CurrentPage),1, defaultBindingMode: BindingMode.TwoWay);

        public int CurrentPage
        {
            get => (int)GetValue(CurrentPageProperty);
            set
            {
                SetValue(CurrentPageProperty, value);
                CheackIfNormalValue();
            }
        }






       
        public Paginator()
        {
            InitializeComponent();


            NextClickCommand = ReactiveCommand.Create(NextClick);
            PreviusClickCommand = ReactiveCommand.Create(PreviusClick);

        }


        public static readonly AvaloniaProperty<ReactiveCommand<Unit, Unit>> NextClickCommandProperty =
            AvaloniaProperty.Register<Paginator, ReactiveCommand<Unit, Unit>>(nameof(NextClickCommand));

        public ReactiveCommand<Unit, Unit> NextClickCommand
        {
            get => (ReactiveCommand<Unit, Unit>)GetValue(NextClickCommandProperty);
            set => SetValue(NextClickCommandProperty, value);
        }
        private void NextClick()
        {
            CurrentPage = CurrentPage < PageCount ? CurrentPage + 1 : CurrentPage;
 
        }




        public static readonly AvaloniaProperty<ReactiveCommand<Unit, Unit>> PreviusClickCommandProperty =
           AvaloniaProperty.Register<Paginator, ReactiveCommand<Unit, Unit>>(nameof(PreviusClickCommand));

        public ReactiveCommand<Unit, Unit> PreviusClickCommand
        {
            get => (ReactiveCommand<Unit, Unit>)GetValue(PreviusClickCommandProperty);
            set => SetValue(PreviusClickCommandProperty, value);
        }
        private void PreviusClick()
        {
            CurrentPage = CurrentPage > 1 ? CurrentPage - 1 : 1;

        }


        private void CheackIfNormalValue()
        {
            if(CurrentPage > PageCount)
            {
                CurrentPage = PageCount;
            }
            if(CurrentPage < 1)
            {
                CurrentPage = 1;
            }
        }







    }
}

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="Application_EKP.Paginator.Paginator"
			 Background="#212121"
			 x:Name="PaginatorC">


	<Grid >
		<Grid.RowDefinitions>
			<RowDefinition Height="10"/>
			<RowDefinition/>
			<RowDefinition Height="10"/>
		</Grid.RowDefinitions>
		
		
		<Grid.ColumnDefinitions>
			<ColumnDefinition/>
			<ColumnDefinition/>
			<ColumnDefinition Width="50"/>
			<ColumnDefinition Width="100"/>
			<ColumnDefinition Width="50"/>
			<ColumnDefinition/>
			<ColumnDefinition/>
			
		</Grid.ColumnDefinitions>

		
		
		
		
		
		<Button Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Center"  Grid.Row="1" Command="{Binding PreviusClickCommand, ElementName=PaginatorC}">
			<Image Source="/Assets/LeftButton.png" VerticalAlignment="Center"></Image>
		</Button>


		<DockPanel HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="1" Grid.Column="3"  MinHeight="30" MinWidth="200">
			<TextBox Text="{Binding CurrentPage, ElementName=PaginatorC}" HorizontalAlignment="Center"  VerticalAlignment="Center" TextAlignment="Center"></TextBox>
			<Panel Width="5"/>
			<TextBlock TextAlignment="Center" HorizontalAlignment="Center"  VerticalAlignment="Center">
				<TextBlock.Text>
					<MultiBinding StringFormat="{}From: {0}">
						<Binding Path="PageCount" ElementName="PaginatorC" />
					</MultiBinding>
					
				</TextBlock.Text>
			</TextBlock>
		</DockPanel>
		
		<Button Grid.Column="5" HorizontalAlignment="Right" VerticalAlignment="Center" Grid.Row="1" Command="{Binding NextClickCommand, ElementName=PaginatorC}">
			<Image Source="/Assets/RightButton.png" VerticalAlignment="Center" ></Image>
		</Button>
		
		
		
		
	</Grid>
	
	
	
</UserControl>