When you upgrade Visual Studio 2013 to Update 2, you may see this error; “The ‘EditorExtensionsPackage’ package did not load correctly Visual Studio”.

This is caused by WebEssentials (and possibly other extensions) as there are breaking changes in some of the Visual Studio APIs with Update 2.

 

So in Visual Studio 2013:

• From the menu select Tools > Extensions and Updates … > Updates > Visual Studio Gallery
• Select Web Essentials 2013 for Update 2
• Click Update
• Let it update, then click on Restart

Visual Studio 2013 should now load without the error.