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Using IIS Express, with Visual Studio 2015, Update 1, when trying to start a MVC 5 website I get the message:

HttpClient cannot be null.

enter image description here

and then the site doesn't show.

I have tried the usual tricks of "closing, deleting the suo and reopening" or "clean & rebuild".

This seems to suggest that I should reinstall Studio, but I'd really rather not.

What is causing this and how do I resolve it without a reinstall?

I don't see the symptoms in this question, nor would I like to disable diagnostic tools like this question suggests.

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NikolaiDante
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1 Answers1

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Moving to Update 2 solved my problem and restored the functionality of the Diagnostic Tools window.

enter image description here

NikolaiDante
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