Issue in Maping the FilterContentViewFrontend template to th

I am using sitefinity 9 and when I try to map News filter custom template I am getting "Error parsing the template" Please see attached screen shot and below is the CLR . Is there anything I am doing wrong? itefinityWebApp.CustomWidgets.News.Views.NewsMasterListViewCustom, SitefinityWebApp

 

<code>

<%@ Control Language="C#" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI.ContentUI" Assembly="Telerik.Sitefinity" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI.Comments" Assembly="Telerik.Sitefinity" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI" Assembly="Telerik.Sitefinity" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="sf" Namespace="Telerik.Sitefinity.Web.UI.PublicControls.BrowseAndEdit" Assembly="Telerik.Sitefinity" %>

<telerik:RadTreeView runat="server" ID="categoriesCombo1" Skin="Sitefinity" />
<telerik:RadComboBox runat="server" ID="categoriesCombo" Skin="Sitefinity" />
<asp:Button runat="server" ID="filterBtn" Text="Filter" />

<telerik:RadListView ID="NewsList" ItemPlaceholderID="ItemsContainer" runat="server" EnableEmbeddedSkins="false" EnableEmbeddedBaseStylesheet="false">
    <LayoutTemplate>
        <sf:ContentBrowseAndEditToolbar ID="MainBrowseAndEditToolbar" runat="server" Mode="Add"></sf:ContentBrowseAndEditToolbar>
        <ul class="sfnewsList sfnewsListTitleDateSummary">
            <asp:PlaceHolder ID="ItemsContainer" runat="server" />
        </ul>
    </LayoutTemplate>
    <ItemTemplate>
        <li class="sfnewsListItem">
            <h2 class="sfnewsTitle">
                <sf:DetailsViewHyperLink ID="DetailsViewHyperLink1" TextDataField="Title" ToolTipDataField="Description" runat="server" />
            </h2>
            <div class="sfnewsMetaInfo">
                <sf:FieldListView ID="PublicationDate" runat="server" Format="PublicationDate.ToLocal():MMM dd, yyyy" />
            </div>

            <sf:FieldListView ID="summary" runat="server" Text="0" Properties="Summary" WrapperTagName="div" WrapperTagCssClass="sfnewsSummary" />

            <sf:DetailsViewHyperLink ID="FullStory" Text="<%$ Resources:NewsResources, FullStory %>" runat="server" CssClass="sfnewsFullStory" />
            <sf:ContentBrowseAndEditToolbar ID="BrowseAndEditToolbar" runat="server" Mode="Edit,Delete,Unpublish"></sf:ContentBrowseAndEditToolbar>
        </li>
    </ItemTemplate>
</telerik:RadListView>
<sf:Pager ID="pager" runat="server"></sf:Pager>
<asp:PlaceHolder ID="socialOptionsContainer" runat="server" />

<code>

Hello Paul,

I have tested the template follwing that article: http://docs.sitefinity.com/create-and-edit-widget-templates and it seems work fine (screenshot). 
The only change is the skin name, as Sitefinity skin is obsolete, I change it to "Default".

If you need to use external widget template file you can check the following articles:
- http://docs.sitefinity.com/for-developers-customize-the-markup-of-a-specific-widget
- http://docs.sitefinity.com/use-external-widget-template-file

In case you have more complex scenario and want to extend the widget functionality you can find more information here:
http://www.sitefinity.com/blogs/stanislav-velikovs-blog/2012/01/23/how_to_add_additional_logic_into_sitefinity_built_in_widgets

Regards,
Svetoslav Manchev
Telerik