404. That’s an error.
The requested URL /add?moduleurl=http%3A%2F%2Fwww.google.com%2Fcoop/api/003578429417738118106/cse/kvapx2l7rpk/gadget was not found on this server. That’s all we know.
/add?moduleurl=http%3A%2F%2Fwww.google.com%2Fcoop/api/003578429417738118106/cse/kvapx2l7rpk/gadget