404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=ZaQBlmJtb-0VENlPk8pX2qfD_k9inE0Lj19stpqGwTDt4-oNHuF3ES8D2zOgTMfonfGvkwE6yY_KsP4YRmajf1l5cKd9TBYxdp0zEAVNi9w%2C was not found on this server. That’s all we know.