ASP.NET ‘Sys.Extended.UI’ is null or not an object error using AjaxControlToolkit
June 15, 2010 6 Comments
To resolve this issue simply add CombineScripts=”false” to the AjaxToolkitManager tag,
<asp:ToolkitScriptManager ID=”ToolkitScriptManager1″ runat=”server” CombineScripts=”false” ></asp:ToolkitScriptManager>
