Unable to cast object of type 'System.Web.Configuration.ScriptingScriptResourceHandlerSection' to type 'System.Web.Configuration. ScriptingScriptResourceHandlerSection'

Simply add to web.config

<assemblyBinding> 
  <dependentAssembly xmlns="urn:schemas-microsoft-com:asm.v1">

  <dependentAssembly>

  <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>

  <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>

  </dependentAssembly>

  <dependentAssembly>

<assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>

   <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>

  </dependentAssembly>

</assemblyBinding>