I came across this error yesterday after installing Master Data Services on a 64bit Windows Server 2008 R2 box and trying to access the MDS WCF web service. After a lot of messing around with mime types and handler mappings, running aspnet_regiis etc. I noticed that the WCF activation feature was not installed.
This can be found here Server Manager –> Features –> Add Features.
As soon as I installed this feature the error went away.
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Richard Hogan
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Richard is a Microsoft-focused architect and consultant with deep expertise in Azure, Microsoft 365, cybersecurity, and enterprise cloud migration. He is the founder of The Microsoft Cloud Blog and co-host of the Cloudy with a Chance of Insights podcast. All views expressed are his own.
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