Why is [Owin] throwing a null exception on new project?

Question

I have a rather strange issue i\'m not sure how to fix or if i can even fix it.

I\'ve done some research into the issue but can\'t find an answer to what\'s causing

Answer 1

I was getting similar error but when I changed EF configuration from DropCreateDatabaseIfModelChanges< Context> to DropCreateDatabaseAlways< Context>.

I'm not sure about cause of your error but it seems like an issue in Katana Project https://katanaproject.codeplex.com/workitem/346

You can try workaround at above link or from https://katanaproject.codeplex.com/discussions/565294

This is what I did in my StartUp.Auth.cs

app.UseCookieAuthentication(new CookieAuthenticationOptions
{
    AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
    LoginPath = new PathString("/Account/Login"),
    Provider = new CookieAuthenticationProvider
    {
           OnValidateIdentity = SecurityStampValidator.OnValidateIdentity(
            validateInterval: TimeSpan.FromMinutes(1),
            regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager)),

           //**** This what I did ***//
            OnException = context => { }
    }
});