404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=R2fOuZB7btHBqrJGGc1EfZeDHdDux6KTLesxlyzDXd8y2lJmLfeS7dhGO1RXby3d7UJxEfGmNoVNYzOTpv_SnWrXMND28N3kStfJRSXnPVU%2C was not found on this server. That’s all we know.