HTTP/1.0 500 Internal Server Error Cache-Control: must-revalidate Connection: close Content-Length: 60 Content-Type: application/json Date: Sat, 01 Oct 2016 13:44:06 GMT Server: CouchDB/2.0.0 (Erlang OTP/17) X-Couch-Request-ID: 5d6c13ef58 X-Couch-Stack-Hash: 2133178905 X-CouchDB-Body-Time: 0 {"error":"unknown_error","reason":"undef","ref":2133178905}