404. That’s an error.
The requested URL /users/oauth/?server=facebook&nv_redirect=X3wKaocJ-Ga_NGAwBn2kNGSIrMYrSKKcDa32CLcq94Twr523qkJy-wFNCtigap-l was not found on this server. That’s all we know.
/users/oauth/?server=facebook&nv_redirect=X3wKaocJ-Ga_NGAwBn2kNGSIrMYrSKKcDa32CLcq94Twr523qkJy-wFNCtigap-l