ASP.NET Identity 2.x - Issue with google authentication

I am having an issue with the Google OAuth middleware.
Context: VS2013 Update 2, created brand new ASP.NET Web Project using MVC with Individual accounts.
This brought in the following versions of the various assemblies via nuget
Microsoft.ASP.NET Identity Core, version 2.0.1 Microsoft.OWIN.Security, version 2.1.0 Microsoft.OWIN.Security.Cookies, version 2.1.0 Microsoft.OWIN.Security.Google, version 2.1.0
I was following a tutorial from Rick Anderson and Erik Reitan (http://www.asp.net/mvc/tutorials/mvc-5/create-an-aspnet-mvc-5-app-with-facebook-and-google-oauth2-and-openid-sign-on) but when I tried to log in via Google the system redirected (ultimately) back to the Login page. Having a look at the network calls, I can see the following
Get /Login POS ...