HTTP Error 500.21 - Internal Server Error
Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list
This error has been seen when browsing to the Xtraction URL, mainly after a new install. This happens when the .NET framework is not full installed, or is not registered with IIS. For example, if you install the .NET 4.6.1 framework on its own, then install the IIS server role and prerequisites afterward, you may encounter this.
Download and run the following Microsoft .NET repair utility - Download Microsoft .NET Framework 4.6.1 (Web Installer) for Windows 7 SP1, Windows 8, Windows 8.1, Windows 10, Windows S…
You will receive a prompt to reboot the server after this completes.