HTTP Error 500.19 when attempting to browse to WebWatchBot Online website

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SUMMARY

When browsing to the site for WebWatchBot Online, HTTP Error 500.19 is displayed.

CAUSE

Some Windows components are not installed/configured.

RESOLUTION

Open "Programs and Features", and then click "Turn features on or off". This starts a wizard to add/remove features and roles.

Add the needed roles:

   "Web Server (IIS)" (default sub-options automatically checked)
         sub-section: "Web Server"
           sub-section: "Application Development"
            ".NET Extensibility 3.5"
            ".NET Extensibility 4.6"
            "ASP.NET 3.5"
            "ASP.NET 4.6"
            "ISAPI Extensions"
            "ISAPI Filters"


windows-roles.png
(View of selected features on Windows 2016)

Verify two features are already installed/enabled:
windows-features.png
(View of selected roles on Windows 2016)