404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=0aEyw1dHAB3QHajaRU7a7v4ZAdv_un_JkawKT7aONAaJV-3GH02WmAD78Ufmnz4PAXffoDzRHUe_TQxBzz1bRw%2C%2C was not found on this server. That’s all we know.