“This operation requires IIS integrated pipeline mode.”

Question

I have a web application being developed on Windows 8.1, .NET 4.5.1, IIS 8.5 (under Integrated AppPool), Visual Studio 2013 over the default template that includes ASP.NET I

Answer 1

This error means the application pool to which your deployed application belongs is not in Integrated mode.

1. Create a new application pool with .NET 4 version selected, and Managed Pipeline mode as Integrated.
2. Change your application's app pool to the above created one and try now.