404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=cNhFMtCYCTTnPEgmrLi3xqHNN-lnj6s9EAYtcYRgPQL_oWel_pPSmwyZBZNG_lsANWpnHz2gtTFPqmkql0M8bg%2C%2C was not found on this server. That’s all we know.