barre_futon added to rebar3.config and in the apps folder

Error Log

(barrel@127.0.0.1)1> [<0.334.0>] [error] Uncaught error in HTTP request: {error,undef}
[<0.334.0>] [info] Stacktrace: [{couch_httpd_request,method,[{httpd,{mochiweb_request,[#Port<0.5377>,[{recbuf,8192}],'GET',"/_utils/",{1,1},{10,{"host",{'Host',"localhost:4444"},{"connection",{'Connection',"keep-alive"},{"cache-control",{'Cache-Control',"max-age=0"},{"accept",{'Accept',"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"},nil,{"accept-encoding",{'Accept-Encoding',"gzip, deflate, sdch"},nil,{"accept-language",{'Accept-Language',"en-GB,en-US;q=0.8,en;q=0.6"},nil,nil}}},nil},
{"cookie",{'Cookie',"4444_recent=demo"},nil,nil}},{"upgrade-insecure-requests",{"Upgrade-Insecure-Requests","1"},{"if-modified-since",{'If-Modified-Since',"Tue, 05 Apr 2016 11:48:11 GMT"},nil,nil},{"user-agent",{'User-Agent',"Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.110 Safari/537.36"},nil,nil}}}}]},"127.0.0.1",'GET',[<<"_utils">>],[<<"_utils">>],{dict,9,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[[<<"_design">>|#Fun<couch_httpd.8.32778275>]],[[<<"_all_docs">>|#Fun<couch_httpd.8.32778275>],[<<"_bulk_get">>|#Fun<couch_httpd.8.32778275>]],[[<<"_view_cleanup">>|#Fun<couch_httpd.8.32778275>]],[],[],[],[[<<"_spatial_cleanup">>|#Fun<couch_httpd.8.32778275>]],[],[[<<"_compact">>|#Fun<couch_httpd.8.32778275>]],[],[],[[<<"_temp_view">>|#Fun<couch_httpd.8.32778275>]],[[<<"_changes">>|#Fun<couch_httpd.8.32778275>]],[],[[<<"_random_doc">>|#Fun<couch_httpd.8.32778275>]],[]}}},{user_ctx,null,[<<"_admin">>],<<"{couch_httpd_auth, default_authentication_handler}">>},undefined,{dict,14,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[[<<"_show">>|#Fun<couch_httpd.10.32778275>],[<<"_spatial">>|#Fun<couch_httpd.10.32778275>]],[[<<"_info">>|#Fun<couch_httpd.10.32778275>],[<<"_list">>|#Fun<couch_httpd.10.32778275>]],[[<<"_update">>|#Fun<couch_httpd.10.32778275>]],[],[[<<"_random">>|#Fun<couch_httpd.10.32778275>],[<<"_spatial/_info">>|#Fun<couch_httpd.10.32778275>],[<<"_spatial/_list">>|#Fun<couch_httpd.10.32778275>]],[],[],[[<<"_compact">>|#Fun<couch_httpd.10.32778275>]],
[[<<"_rewrite">>|#Fun<couch_httpd.10.32778275>]],[],[],[[<<"_reindex">>|#Fun<couch_httpd.10.32778275>]],[[<<"_view">>|#Fun<couch_httpd.10.32778275>]],[],[[<<"_spatial/_compact">>|#Fun<couch_httpd.10.32778275>],[<<"_spatiallist">>|#Fun<couch_httpd.10.32778275>]]}}},undefined,#Fun<couch_httpd.6.32778275>,{dict,14,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[[<<"_replicate">>|#Fun<couch_httpd.6.32778275>],[<<"_restart">>|#Fun<couch_httpd.6.32778275>]],[[<<"_active_tasks">>|#Fun<couch_httpd.6.32778275>]],[],[],[[<<"/">>|#Fun<couch_httpd.6.32778275>],[<<"_config">>|#Fun<couch_httpd.6.32778275>],[<<"_utils">>|#Fun<couch_httpd.6.32778275>]],[[<<"_log">>|#Fun<couch_httpd.6.32778275>]],[],[[<<"_db_updates">>|#Fun<couch_httpd.6.32778275>]],[[<<"_all_dbs">>|#Fun<couch_httpd.6.32778275>]],[],[[<<"_stats">>|#Fun<couch_httpd.6.32778275>],[<<"favicon.ico">>|#Fun<couch_httpd.5.32778275>]],[[<<"_session">>|#Fun<couch_httpd.6.32778275>],[<<"_uuids">>|#Fun<couch_httpd.6.32778275>]],[],[],[[<<"_oauth">>|#Fun<couch_httpd.6.32778275>]],[]}}}}],[]},{barrel_httpd_futon,handle_req,1,[{file,"/home/sivsushruth/gsoc/futon_upgrade/barrel-platform/_build/default/lib/barrel_futon/src/barrel_httpd_futon.erl"},{line,6}]},{couch_httpd,handle_request_int,5,[{file,"/home/sivsushruth/gsoc/futon_upgrade/barrel-platform/_build/default/lib/couch_httpd/src/couch_httpd.erl"},{line,283}]},{mochiweb_http,headers,6,[{file,"/home/sivsushruth/gsoc/futon_upgrade/barrel-platform/_build/default/lib/mochiweb/src/mochiweb_http.erl"},{line,114}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,240}]}]
[<0.334.0>] [info] 127.0.0.1 - - GET /_utils/ 500
[<0.334.0>] [error] httpd 500 error response:
 {"error":"unknown_error","reason":"undef"}