Twitter external login with Owin gives HTTP 403 (Forbidden)
ASP.NET MVC 5 Project. Owin Version 4.0.0.0 Startup.Auth app.UseTwitterAuthentication( consumerKey: "somekey", consumerSecret: "someSecretKey"); The exception happened in the ExternalLogin method Response status code does not indicate success: 403 (Forbidden). Here are the callback URLs FYI: the website is real and it is working without problem, The Twitter Login was working a couple of weeks ago, but Now, suddenly, started to fail with the previous error. StackTrace [HttpRequestException: Response status code does not indicate success: 403 (Forbidden).] System.Net.Http.HttpResponseMessage