We are upgrading Telerik UI ASP.NET MVC from 2017.2.504.545 to 2022.1.301.545. We installed the latest DLL from MSI file and manually replaced the scripts and CSS files in the solution as well as referenced the 2022 Kendo.MVC.dll in the solution. Build success. When we try to access the page that use Teleric controls, I get the exception 'Grid' is ambiguous because multiple kinds of members with this name exist in class 'Kendo.Mvc.UI.Fluent.WidgetFactory' . If I change the dll version back to 2017, error is gone and page loads just fine. How can I resolve this? Is there anything missing in the upgrade steps I did?