404. That’s an error.
The requested URL /index.php/users/oauth/?server=facebook&nv_redirect=JGWAnvO5RiEibbSIaMqgZci_bsbQXoVrehuncxFDJDKePgRuKg8mR1gNyKTlbEZUGMPk6fEHCRo0E5-aEQgzq7fwIu5DwWCzv9iopHs_S3I%2C
was not found on this server. That’s all we know.