Home Kendo Grid UI Filter menu customization have an error
 I am having trouble with the filter menu customization example on (https://demos.telerik.com/aspnet-mvc/grid/filter-menu-customization). My code looks similar to it but get an error when I run my web app. However, when I run this I get an error saying: Cannot convert lambda expression to type "bool" because it is not a delegate type. This happens on line .Filterable(ftp => ftp.UI("persianDateFilter")) This is my Index.cshtml file: @using Kendo.Mvc.UI; @using Kendo.Mvc.Extensions; @{ ViewBag.Title = "Employee"; Layout = "~/Views/Shared/_Layout.cshtml"; }
 What is my mistake? I Use "Telerik UI for ASP.NET MVC R1 2018" version!