I know, I know, this may have been asked many times, but I just don't understand the error message. I'm not able to follow the error stack below. If you guys can help locating what is causing not being able launch my app will be greatly appreciated.
db connected successfully
2017-01-19T03:34:27.564317+00:00 heroku[router]: at=info method=GET path="/images/cover.jpg" host=xxxx.herokuapp.com request_id=xxx-55ed-476d-be16-78b88axxxx fwd="45.20.xxx.xxx" dyno=web.1 connect=0ms service=28ms status=200 bytes=108308
2017-01-19T03:34:27.566725+00:00 app[web.1]: GET /images/cover.jpg 200 10.252 ms - 108029
2017-01-19T03:34:29.588301+00:00 heroku[web.1]: Process exited with status 1
2017-01-19T03:34:29.597382+00:00 heroku[web.1]: State changed from up to crashed
2017-01-19T03:34:29.475407+00:00 app[web.1]: events.js:160
2017-01-19T03:34:29.475422+00:00 app[web.1]: throw er; // Unhandled 'error' event
2017-01-19T03:34:29.475423+00:00 app[web.1]: ^
2017-01-19T03:34:29.475424+00:00 app[web.1]:
2017-01-19T03:34:29.475425+00:00 app[web.1]: Error: spawn compass ENOENT
2017-01-19T03:34:29.475426+00:00 app[web.1]: at exports._errnoException (util.js:1026:11)
2017-01-19T03:34:29.475427+00:00 app[web.1]: at Process.ChildProcess._handle.onexit (internal/child_process.js:182:32)
2017-01-19T03:34:29.475428+00:00 app[web.1]: at onErrorNT (internal/child_process.js:348:16)
2017-01-19T03:34:29.475428+00:00 app[web.1]: at _combinedTickCallback (internal/process/next_tick.js:74:11)
2017-01-19T03:34:29.475429+00:00 app[web.1]: at process._tickCallback (internal/process/next_tick.js:98:9)
2017-01-19T03:34:29.488804+00:00 app[web.1]:
2017-01-19T03:34:29.496263+00:00 app[web.1]: npm ERR! Linux 3.13.0-105-generic
2017-01-19T03:34:29.496491+00:00 app[web.1]: npm ERR! argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start"
2017-01-19T03:34:29.496733+00:00 app[web.1]: npm ERR! node v6.4.0
2017-01-19T03:34:29.496934+00:00 app[web.1]: npm ERR! npm v3.10.3
2017-01-19T03:34:29.497120+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2017-01-19T03:34:29.497271+00:00 app[web.1]: npm ERR! xxxxx@1.0.0 start: `node ./bin/www`
2017-01-19T03:34:29.497396+00:00 app[web.1]: npm ERR! Exit status 1
2017-01-19T03:34:29.497536+00:00 app[web.1]: npm ERR!