404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=kM5j4jLKcjXW56MYODPG65DIJ45czmRTLf73Rf2MtVgL4hPXMRYFZKLIEc--QVpNg85RDlDePVTeY_NQCcpNcQ%2C%2C was not found on this server. That’s all we know.