Today I loaded up Visual Studio to continue work on a project and created by a random bunch of errors. All were complaints that various packages could not be loaded. The one I captured was:
[alert color=”gray”]The ‘JavascriptWebExtensionsPackage’ did not load correctly.’ The problem may have been caused by a configuration change or by the installation of another extension.[/alert]
I had just installed SyncFusion’s Essential Studio which apparently screwed something up. I tried doing a repair on Visual Studio which unfortunately did not work.

I was able to fix it by following these steps:

1. Close Visual Studio Open the *Users*\AppData\Local\Microsoft\VisualStudio\12.0\ folder
2. Rename the ComponentModelCache folder
3. Restart Visual Studio.

Visual Studio should now rebuild the cache and no longer display the error messages.