404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=FXkrXhiWtiKPSgMLGKoJDY3T_k5YgYFBF_uwTBga7I-RIyAz_3Fwtpg9mhZTuO1e4CQoyw8hO6MzWpy2C0QdNX4CPf0QMfDOGLJqK7XZY3KhAJgeVw75whqDaQfZmOx_ was not found on this server. That’s all we know.