404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=CmUSp8vGxEm_GYO3DrQ7nO48Fn5nY67wxw_MKmSg26ANwf44jpGgBtx4MiREy9NiiIJLn_HV6vWqqLGS7DPq9v5NKRNxlfSki7Oj4ZT7zxk%2C was not found on this server. That’s all we know.