404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=aZkYnhuZaD-k6s16WTrsvk1kzXMsSwNob-lkvuZXkpVqFvOPtNK8i_HPAqsLdsw1jerFGZ9c8SSo7bGKYhq_gw%2C%2C was not found on this server. That’s all we know.