Once running ASP.NET 4.x application built in Visual Studio 2013 I am getting the below exception.
I have tried to disable the PageInspector by removing page inspect
I've also seen this problem in some web apps running on dev machines using Visual Studio 2013 with "Browser Link" enabled.
In multiple cases that I have seen, leaving Browser Link enabled causes all sorts of issues, both client script and security warnings, and server exceptions like this one (annoying thing is that it appears to be enabled by default, thanks Msft!)