404. That’s an error.
The requested URL /users/oauth/?server=facebook&nv_redirect=wjIdYpeK8c4cVgEm70IYlqlYNVYYek57p1rLgS4LQ-MWjllOWxHvDGE_oL4JxFVwUsy103ghNWhPNRrTp-afYITmJrR6e38QbqACOnBtWlLa46Ui1mT0Gwz-u8ftwttX
was not found on this server. That’s all we know.