HTTP/1.0 500 Internal Server Error Cache-Control: must-revalidate Connection: close Content-Length: 60 Content-Type: application/json Date: Sun, 28 Aug 2016 06:49:12 GMT Server: CouchDB/ad97a06 (Erlang OTP/17) X-Couch-Request-ID: 31c5594b1e X-Couch-Stack-Hash: 2133178905 X-CouchDB-Body-Time: 0 {"error":"unknown_error","reason":"undef","ref":2133178905}