WebSecurity vs FormsAuthentication in ASP.NET MVC4

Question

I guess I am trying to mix two providers in project but I am looking to use websecurity in conjunction to my forms authentication. I need websecurity for OAUTH authentication us

Answer 1

Could possibly be related to the same issue as me MVC4 ExtendedMembershipProvider and entityframework .. I removed the universal providers nuget package and this particular error dissappeared.

Also this "very recent" article by Jon Galloway may help.