I have configured the login to a ASP MVC web application with facebook , twitter , G + and Microsoft , but facebook stopped working. I read that facebook changed some things, they know if there is a way to solve the problem and if I can continue using the OAuth library that I use.
The error that marks me is in this line:
AuthenticationResult result = OAuthWebSecurity.VerifyAuthentication(Url.Action("ExternalLoginCallback", new { ReturnUrl = returnUrl }));
The error is that it returns result.IsSuccessful = false, when it should return true, as I comment, I did not move code nor the configuration just stopped working.