Error 500.19 message when LobbyCentral installed on Windows Server 2016

After installing LobbyCentral on or upgrading an existing server to Windows Server 2016, users see the follow error message;

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid

This error is displayed when the Handlers section for a website is locked at the parent level.   This disallows child applications from overriding Handlers.

To resolve this issue, you must unlock the Handler section on the Default Web Site

1. Open IIS and in the connections tree, go to the server node and then select Default Web Site
2. In the right window you will see configuration editor under Management.
3. Double click on the configuration editor.
4. In the window that opens, on top you will find a drop down for sections.  Choose system.webServer/handlers from the drop down.
5. On the right side, there is another drop down. Choose ApplicationHost.Config
6. On the right most pane, you will find Unlock Section under "Section" heading. Click on that.

Once the handlers at the applicationHost is unlocked, LobbyCentral should be accessible.

Additionally, you may need to verify that .NET Extensibility has been enabled in Server Roles:

1. On Server 2016, open Server Manager
2. Go to Roles and Features
3. Continue until you get to the Server Roles
4. Under Web Server, expand Application Development
5. Check the .NET Extensibility 4.6,, ASP.NET 4.6, ISAPI options