Uknown server tag 'telerik:RadScriptManager'

[Vasya Ivanov]

Hi guys,
I have created a project out of existing one(I do not want to mess with existing version).Created a new page and when I go to design view I am getting error:Uknown server tag 'telerik:RadScriptManager' and also getting error that Master file could not be found but its there.
And also I checked bin directory and Telerik.Web.UI.dll file is there.

<%@ Page Language="C#" MasterPageFile="~/EISMaster.Master" AutoEventWireup="true" CodeBehind="RatingFormGuidanceCounselor.aspx.cs" Inherits="EISPortal.Ratings.RatingFormGuidanceCounselor" Title="Untitled Page" %>

<%@ Register TagPrefix="telerik" Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" %>

<

 

asp:Content ID="Content1" ContentPlaceHolderID="cphNavigation" runat="server">

 

 

</

 

asp:Content>

 

 

<

 

asp:Content ID="Content2" ContentPlaceHolderID="cphMain" runat="server">

 

 

<

 

telerik:RadScriptManager ID="ScriptManager1" runat="server" />

 

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">

 

 

<AjaxSettings>

 

<telerik:AjaxSetting AjaxControlID="mainPanel">

 

<UpdatedControls>

 

<telerik:AjaxUpdatedControl ControlID="mainPanel" LoadingPanelID="RadAjaxLoadingPanel1" />

 

</UpdatedControls>

 

</telerik:AjaxSetting>

 

 

</AjaxSettings>

 

</telerik:RadAjaxManager>

 

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" EnableSkinTransparency ="true" runat="server">

 

</telerik:RadAjaxLoadingPanel>

Thanks so much for your help.

[Yana]

Hello Vasya,

Please check this help article which explains how to fix this issue.

All the best,
Yana
the Telerik team