MVC 5 Owin Facebook Auth results in Null Reference Exception

Question

I\'m trying to setup integrated OWIN Facebook authentication in a new MVC 5 project in Visual Studio 2013. I have configured apps and keys as per this tutorial:

http

Answer 1

I faced the same problem, when I checked libraries, I was using Microsoft ASP.NET Identity Owin 1.0.0 I updated it to Microsoft ASP.NET Identity Owin 2.0.1 using command PM> Install-Package Microsoft.AspNet.Identity.Owin -Version 2.0.1 This fixed the issue.