Parser Error

Server Error in '/' Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load file or assembly 'Telerik.Web.UI, Version=2020.3.1021.45, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Source Error:

Line 1:  <%@ Control Language="vb" AutoEventWireup="false" CodeBehind="CostEstimate.ascx.vb" Inherits="N1SCalculator.CostEstimate" %>
Line 2:  
Line 3:  

Source File: /calculatorn1s/costestimate.ascx    Line: 1