I've found in this answer another way to fix it without the devenv.exe /ResetUserData
Just delete the contents of this directory with Visual Studio closed:
%LocalAppData%MicrosoftVisualStudio<visual_studio_version_number>ComponentModelCache
To find the version number of the Visual Studio edition your are running please refer this list. Note that only the major number is important, the minor version can and will probably differ. In my case I had Visual Studio 2017 Enterprise installed so I looked for 15.xx
and found 15.0_9a1c4a06
inside the AppData folder.
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