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HTTP Error 500.19 – Internal Server Error when browsing the SmartConnect WCF web service.

Published: Jan 30, 2023
Post Author Written by David Youngquist

When attempting to browse the SmartConnect WCF web service, the browser window reports an error that says “HTTP Error 500.19 – Internal Server Error” followed by an additional message that says “The requested page cannot be accessed because the related configuration data for the page is invalid.”  What is causing this?


This means you do not have the required ASP.NET components installed on your IIS server.  

1.  Go to Start – Administrative Tools – Server Manager

2.  Click on “Add roles and features”

3.  Click on Features

4.  Expand the .NET Framework 3.5 Features and .NET Framework 4.5 Features.  At the very minimum mark all the components shown in the screenshot below.  

5.  After installing the features restart the SmartConnect WCF service by going into IIS Manager highlighting the service and pressing the restart button on the right.

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