Asp .Net WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery' Error

Asp .Net WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery' Error

<configuration>  
  <system.web>  
   <compilation debug="true" targetFramework="4.5.1" />  
   <httpRuntime targetFramework="4.5.1" />  
  </system.web>  
  <appSettings>  
   <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />  
  </appSettings>  
 </configuration>