404. That’s an error.
The requested URL /index.php/users/oauth/?server=facebook&nv_redirect=fSpH_uKoyXlrpDOIZVQGK5n4PUyPY85-srGkwcx5itE1CqX4GEoD6RyD7hwnROfIPRhj6HLqM3mjRki3iDPwkETyFAG7eDSbGMbxQlTpsDNLLZ_xG_oA0etCnUcsmOO2
was not found on this server. That’s all we know.