404. That’s an error.
The requested URL /add?moduleurl=http%3A%2F%2Fwww.google.com%2Fcoop/api/011654324454506160096/cse/847jia-cg_c/gadget was not found on this server. That’s all we know.
/add?moduleurl=http%3A%2F%2Fwww.google.com%2Fcoop/api/011654324454506160096/cse/847jia-cg_c/gadget