Visual Studio error “Object reference not set to an instance of an object” after install of ASP.NET and Web Tools 2015

Question

After installing the ASP.NET and Web Tools 2015 (RC1 update 1) I get the following error within ASP.NET MVC 4 projects when opening *.cshtml files:

Answer 1

I was getting this exception every time I created a "new" project.

My solution was:

• Go menu Tools ? Extensions and Updates
• Not check the "Updates" link...search "asp.net". There was an update to Microsoft ASP.NET and Web Tools. Get it as AspNetWebFrameworksTools2015_KB3137909.exe and install it.

That fixed it for me.

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Unfortunately, I ran into another exception:

"Exception has been thrown by the target of an invocation"

I disabled the FIPS setting Enabled DWORD value to zero.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\FipsAlgorithmPolicy]
Enabled=dword:00000000 And All fixed.