The 'Provider Package' did not load correctly

Question

VS 2013 Professional - Version 12.0.31101.00 Update 4

All of a sudden, whenever I try to open a project (MVC project or Python project), I get:

Answer 1

Delete folder ComponenModelCache

C:\Users\XXXX\AppData\Local\Microsoft\VisualStudio\XX\ComponentModelCache

that worked for me