404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=U3g0CQsmzdoBoX_g7m2lHdVFhNpAQNpfyM9VwjL9Jpk3lPEFJeYDD4HahqNYXGbbHAASiXjVpyEReHJbrxGxdlll1J20-YOViXSwr61cA6s%2C was not found on this server. That’s all we know.