404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=YsvyzZTprS4U8qEI_v_D_u1arytnoUaP7ZfDoImQxuTTaFxrSmV6wvo0ZYHrj527cG6r4dCe2525uCDbaVgMTQBgPz2hkzLjgzTXyR0H2lg%2C was not found on this server. That’s all we know.