404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=PyaN2v206ZHh1bxvALGHrGjhjTiVn0VswcYq1lut_IE7j2_YX5pyHWrEv9yNO2EhRBuomwKUGmqLNimjNHWF9Q%2C%2C was not found on this server. That’s all we know.