Error: Server error in Application

When attempting to add parts, pages or templates to a newly created Multi Site Site, the following error is received:
Error: Server error in Application
The WebResource.axd handler must be registered in the configuration to process this request.

<!-- Web.Config Configuration File -->

<configuration>
   <system.web>
       <httpHandlers>
           <add path="WebResource.axd" verb="GET" type="System.Web.Handlers.AssemblyResourceLoader" validate="True" />
       </httpHandlers>
   </system.web>
</configuration>
We are currently evaluating this issue and will update this article when we have more information.

Environment

 6.53.516.27

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