VS2015 - The 'NuGetPackage' package did not load correctly

Question

Just opened up VS 2015 Enterprise RTM, opened up an existing working project, getting the following error:

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Microsoft Visual Studio

Answer 1

Deleting all the files from this folder C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\imf5jbeu.eak seem to have worked for me.