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我尝试在Heroku上部署我的应用，但部署后我遇到了错误。我已经阅读了其他帖子，但没有一个与我的问题相似。
任何人都可以帮我发现问题吗？
这是日志：
2017-12-11T05:53:56.495800+00:00 app[web.1]: Condition always false [./~/react-dom/lib/SimpleEventPlugin.js:193,24]
2017-12-11T05:53:56.495801+00:00 app[web.1]: Side effects in initialization of unused variable invariant [./~/react-dom/lib/SimpleEventPlugin.js:31,4]
2017-12-11T05:53:56.495801+00:00 app[web.1]: Condition always false [./~/react-dom/lib/dangerousStyleValue.js:49,8]
2017-12-11T05:53:56.495802+00:00 app[web.1]: Dropping unreachable code [./~/react-dom/lib/dangerousStyleValue.js:52,6]
2017-12-11T05:53:56.495802+00:00 app[web.1]: Declarations in unreachable code! [./~/react-dom/lib/dangerousStyleValue.js:53,8]
2017-12-11T05:53:56.495803+00:00 app[web.1]: Declarations in unreachable code! [./~/react-dom/lib/dangerousStyleValue.js:58,8]
2017-12-11T05:53:56.495803+00:00 app[web.1]: Declarations in unreachable code! [./~/react-dom/lib/dangerousStyleValue.js:60,10]
2017-12-11T05:53:56.495804+00:00 app[web.1]: Dropping unused variable owner [./~/react-dom/lib/dangerousStyleValue.js:53,12]
2017-12-11T05:53:56.495804+00:00 app[web.1]: Dropping unused variable ownerName [./~/react-dom/lib/dangerousStyleValue.js:54,12]
2017-12-11T05:53:56.495805+00:00 app[web.1]: Dropping unused variable warned [./~/react-dom/lib/dangerousStyleValue.js:58,12]
2017-12-11T05:53:56.495806+00:00 app[web.1]: Dropping unused variable warnings [./~/react-dom/lib/dangerousStyleValue.js:60,14]
2017-12-11T05:53:56.495806+00:00 app[web.1]: Side effects in initialization of unused variable warning [./~/react-dom/lib/dangerousStyleValue.js:12,4]
2017-12-11T05:53:56.495807+00:00 app[web.1]: Dropping unused variable styleWarnings [./~/react-dom/lib/dangerousStyleValue.js:15,4]
2017-12-11T05:53:56.495807+00:00 app[web.1]: Condition always false [./~/react-dom/lib/findDOMNode.js:30,6]
2017-12-11T05:53:56.495808+00:00 app[web.1]: Dropping unreachable code [./~/react-dom/lib/findDOMNode.js:30,45]
2017-12-11T05:53:56.495808+00:00 app[web.1]: Declarations in unreachable code! [./~/react-dom/lib/findDOMNode.js:31,4]
2017-12-11T05:53:56.495809+00:00 app[web.1]: Condition always false [./~/react-dom/lib/findDOMNode.js:51,13]
2017-12-11T05:53:56.495809+00:00 app[web.1]: Condition always true [./~/react-dom/lib/findDOMNode.js:51,4]
2017-12-11T05:53:56.495810+00:00 app[web.1]: Condition always false [./~/react-dom/lib/findDOMNode.js:53,13]
2017-12-11T05:53:56.495810+00:00 app[web.1]: Condition always true [./~/react-dom/lib/findDOMNode.js:53,4]
2017-12-11T05:53:56.495811+00:00 app[web.1]: Dropping unused variable owner [./~/react-dom/lib/findDOMNode.js:31,8]
2017-12-11T05:53:56.495812+00:00 app[web.1]: Side effects in initialization of unused variable ReactCurrentOwner [./~/react-dom/lib/findDOMNode.js:13,4]
2017-12-11T05:53:56.495812+00:00 app[web.1]: Side effects in initialization of unused variable invariant [./~/react-dom/lib/findDOMNode.js:18,4]
2017-12-11T05:53:56.495813+00:00 app[web.1]: Side effects in initialization of unused variable warning [./~/react-dom/lib/findDOMNode.js:19,4]
2017-12-11T05:53:56.495813+00:00 app[web.1]: Condition always false [./~/react-dom/lib/flattenChildren.js:38,8]
2017-12-11T05:53:56.495814+00:00 app[web.1]: Dropping unreachable code [./~/react-dom/lib/flattenChildren.js:39,6]
2017-12-11T05:53:56.495815+00:00 app[web.1]: Condition always false [./~/react-dom/lib/flattenChildren.js:63,6]
2017-12-11T05:53:56.495816+00:00 app[web.1]: Dropping unreachable code [./~/react-dom/lib/flattenChildren.js:64,4]
2017-12-11T05:53:56.495817+00:00 app[web.1]: Boolean && always false [./~/react-dom/lib/flattenChildren.js:18,4]
2017-12-11T05:53:56.495817+00:00 app[web.1]: Condition always false [./~/react-dom/lib/flattenChildren.js:18,4]
2017-12-11T05:53:56.495818+00:00 app[web.1]: Dropping unreachable code [./~/react-dom/lib/flattenChildren.js:24,2]
2017-12-11T05:53:56.495819+00:00 app[web.1]: Side effects in initialization of unused variable KeyEscapeUtils [./~/react-dom/lib/flattenChildren.js:12,4]
2017-12-11T05:53:56.495819+00:00 app[web.1]: Side effects in initialization of unused variable warning [./~/react-dom/lib/flattenChildren.js:14,4]
2017-12-11T05:53:56.495820+00:00 app[web.1]: Dropping unused variable ReactComponentTreeHook [./~/react-dom/lib/flattenChildren.js:16,4]
2017-12-11T05:53:56.495820+00:00 app[web.1]: Condition always false [./~/react/lib/PooledClass.js:69,33]
2017-12-11T05:53:56.495821+00:00 app[web.1]: Side effects in initialization of unused variable invariant [./~/react/lib/PooledClass.js:14,4]
2017-12-11T05:53:56.495821+00:00 app[web.1]: Condition always false [./~/react/lib/ReactDOMFactories.js:19,4]
2017-12-11T05:53:56.495822+00:00 app[web.1]: Dropping unreachable code [./~/react/lib/ReactDOMFactories.js:19,43]
2017-12-11T05:53:56.495823+00:00 app[web.1]: Declarations in unreachable code! [./~/react/lib/ReactDOMFactories.js:20,2]
2017-12-11T05:53:56.495826+00:00 app[web.1]: Dropping unused variable ReactElementValidator [./~/react/lib/ReactDOMFactories.js:20,6]
2017-12-11T05:53:56.495829+00:00 app[web.1]: Condition always false [./~/react/lib/onlyChild.js:31,43]
2017-12-11T05:53:56.495827+00:00 app[web.1]: Dropping unreachable code [./~/react/lib/lowPriorityWarning.js:27,43]
2017-12-11T05:53:56.495827+00:00 app[web.1]: Condition always false [./~/react/lib/lowPriorityWarning.js:27,4]
2017-12-11T05:53:56.495828+00:00 app[web.1]: Declarations in unreachable code! [./~/react/lib/lowPriorityWarning.js:28,2]
2017-12-11T05:53:56.495828+00:00 app[web.1]: Dropping unused variable printWarning [./~/react/lib/lowPriorityWarning.js:28,6]
2017-12-11T05:53:56.495829+00:00 app[web.1]: Side effects in initialization of unused variable invariant [./~/react/lib/onlyChild.js:14,4]
2017-12-11T05:53:56.495830+00:00 app[web.1]: Condition always false [./~/react/lib/traverseAllChildren.js:106,12]
2017-12-11T05:53:56.495830+00:00 app[web.1]: Dropping unreachable code [./~/react/lib/traverseAllChildren.js:106,51]
2017-12-11T05:53:56.495831+00:00 app[web.1]: Declarations in unreachable code! [./~/react/lib/traverseAllChildren.js:107,10]
2017-12-11T05:53:56.495832+00:00 app[web.1]: Declarations in unreachable code! [./~/react/lib/traverseAllChildren.js:109,12]
2017-12-11T05:53:56.495832+00:00 app[web.1]: Condition always false [./~/react/lib/traverseAllChildren.js:129,10]
2017-12-11T05:53:56.495833+00:00 app[web.1]: Dropping unreachable code [./~/react/lib/traverseAllChildren.js:134,8]
2017-12-11T05:53:56.495833+00:00 app[web.1]: Declarations in unreachable code! [./~/react/lib/traverseAllChildren.js:135,10]
2017-12-11T05:53:56.495834+00:00 app[web.1]: Condition always false [./~/react/lib/traverseAllChildren.js:142,15]
2017-12-11T05:53:56.495834+00:00 app[web.1]: Condition always true [./~/react/lib/traverseAllChildren.js:142,6]
2017-12-11T05:53:56.495835+00:00 app[web.1]: Dropping unused variable mapsAsChildrenAddendum [./~/react/lib/traverseAllChildren.js:107,14]
2017-12-11T05:53:56.495836+00:00 app[web.1]: Dropping unused variable mapsAsChildrenOwnerName [./~/react/lib/traverseAllChildren.js:109,16]
2017-12-11T05:53:56.495836+00:00 app[web.1]: Dropping unused variable name [./~/react/lib/traverseAllChildren.js:135,14]
2017-12-11T05:53:56.495837+00:00 app[web.1]: Side effects in initialization of unused variable ReactCurrentOwner [./~/react/lib/traverseAllChildren.js:13,4]
2017-12-11T05:53:56.495837+00:00 app[web.1]: Side effects in initialization of unused variable invariant [./~/react/lib/traverseAllChildren.js:17,4]
2017-12-11T05:53:56.495838+00:00 app[web.1]: Side effects in initialization of unused variable warning [./~/react/lib/traverseAllChildren.js:19,4]
2017-12-11T05:53:56.495838+00:00 app[web.1]: Dropping unused variable didWarnAboutMaps [./~/react/lib/traverseAllChildren.js:35,4]
2017-12-11T05:53:56.495839+00:00 app[web.1]: Dropping unused variable curPlaceHolder [./~/socket.io-parser/binary.js:63,6]
2017-12-11T05:53:56.495840+00:00 app[web.1]: Non-strict equality against boolean: == false [./~/wtf-8/wtf-8.js:5,19]
2017-12-11T05:53:56.495840+00:00 app[web.1]: Condition always false [./~/wtf-8/wtf-8.js:5,19]
2017-12-11T05:53:56.495841+00:00 app[web.1]: Non-strict equality against boolean: == false [./~/wtf-8/wtf-8.js:8,18]
2017-12-11T05:53:56.495842+00:00 app[web.1]: Condition left of && always true [./~/wtf-8/wtf-8.js:213,2]
2017-12-11T05:53:56.495844+00:00 app[web.1]: Dropping unreachable code [./~/style-loader!./~/css-loader!./~/sass-loader!./public/src/scss/index.scss:12,0]
2017-12-11T05:53:56.495842+00:00 app[web.1]: Condition always false [./~/style-loader/addStyles.js:24,0]
2017-12-11T05:53:56.495841+00:00 app[web.1]: Condition always false [./~/wtf-8/wtf-8.js:8,18]
2017-12-11T05:53:56.495843+00:00 app[web.1]: Dropping unreachable code [./~/style-loader/addStyles.js:25,0]
2017-12-11T05:53:56.495843+00:00 app[web.1]: Condition always false [./~/style-loader!./~/css-loader!./~/sass-loader!./public/src/scss/index.scss:10,0]
2017-12-11T05:53:56.495845+00:00 app[web.1]: Side effects in initialization of unused variable update [./~/style-loader!./~/css-loader!./~/sass-loader!./public/src/scss/index.scss:7,0]
2017-12-11T05:54:22.620478+00:00 app[web.1]: { Error: spawn EACCES
2017-12-11T05:54:22.620488+00:00 app[web.1]: at exports._errnoException (util.js:1008:11)
2017-12-11T05:54:22.620490+00:00 app[web.1]: at exports.spawn (child_process.js:372:9)
2017-12-11T05:54:22.620489+00:00 app[web.1]: at ChildProcess.spawn (internal/child_process.js:302:11)
2017-12-11T05:54:22.620490+00:00 app[web.1]: at /app/node_modules/fluent-ffmpeg/lib/processor.js:152:24
2017-12-11T05:54:22.620492+00:00 app[web.1]: at FfmpegCommand.proto._getFfmpegPath (/app/node_modules/fluent-ffmpeg/lib/capabilities.js:90:14)
2017-12-11T05:54:22.620493+00:00 app[web.1]: at FfmpegCommand.proto.availableFormats.proto.getAvailableFormats (/app/node_modules/fluent-ffmpeg/lib/capabilities.js:517:10)
2017-12-11T05:54:22.620492+00:00 app[web.1]: at FfmpegCommand.proto._spawnFfmpeg (/app/node_modules/fluent-ffmpeg/lib/processor.js:132:10)
2017-12-11T05:54:22.620494+00:00 app[web.1]: at /app/node_modules/fluent-ffmpeg/lib/capabilities.js:568:14
2017-12-11T05:54:22.620495+00:00 app[web.1]: at fn (/app/node_modules/async/lib/async.js:746:34)
2017-12-11T05:54:22.620496+00:00 app[web.1]: at /app/node_modules/async/lib/async.js:1213:16 code: 'EACCES', errno: 'EACCES', syscall: 'spawn' }
2017-12-11T05:54:28.484964+00:00 app[web.1]: ::ffff:10.33.225.21 - - [Mon, 11 Dec 2017 05:54:28 GMT] "GET /download?v=7aeI3c-jLnw HTTP/1.1" - - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36"
2017-12-11T05:54:28.481711+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/download?v=7aeI3c-jLnw" host=ultramendoza-mp3.herokuapp.com request_id=8cf8d789-101b-4c51-882c-0b994a2b1e53 fwd="201.210.244.119" dyno=web.1 connect=1ms service=30000ms status=503 bytes=0 protocol=https
2017-12-11T05:54:52.536326+00:00 app[web.1]: ::ffff:10.63.101.233 - - [Mon, 11 Dec 2017 05:54:52 GMT] "GET /download?v=7aeI3c-jLnw HTTP/1.1" - - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36"
2017-12-11T05:54:52.534534+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/download?v=7aeI3c-jLnw" host=ultramendoza-mp3.herokuapp.com request_id=8cd2bb50-8c1e-41df-b6ff-a5ffb469a2bf fwd="201.210.244.119" dyno=web.1 connect=1ms service=30000ms status=503 bytes=0 protocol=https
2017-12-11T05:54:53.116203+00:00 app[web.1]: ::ffff:10.99.177.132 - - [Mon, 11 Dec 2017 05:54:53 GMT] "GET /favicon.ico HTTP/1.1" 404 150 "https://ultramendoza-mp3.herokuapp.com/download?v=7aeI3c-jLnw" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36"
2017-12-11T05:54:53.112390+00:00 heroku[router]: at=info method=GET path="/favicon.ico" host=ultramendoza-mp3.herokuapp.com request_id=762a3afc-dd03-4536-a651-3d76d0693a17 fwd="201.210.244.119" dyno=web.1 connect=1ms service=7ms status=404 bytes=426 protocol=https
2017-12-11T05:55:48.403901+00:00 app[web.1]: { Error: spawn EACCES
2017-12-11T05:55:48.403916+00:00 app[web.1]: at exports._errnoException (util.js:1008:11)
2017-12-11T05:55:48.403917+00:00 app[web.1]: at ChildProcess.spawn (internal/child_process.js:302:11)
2017-12-11T05:55:48.403918+00:00 app[web.1]: at exports.spawn (child_process.js:372:9)
2017-12-11T05:55:48.403918+00:00 app[web.1]: at /app/node_modules/fluent-ffmpeg/lib/processor.js:152:24
2017-12-11T05:55:48.403920+00:00 app[web.1]: at FfmpegCommand.proto._getFfmpegPath (/app/node_modules/fluent-ffmpeg/lib/capabilities.js:90:14)
2017-12-11T05:55:48.403921+00:00 app[web.1]: at FfmpegCommand.proto._spawnFfmpeg (/app/node_modules/fluent-ffmpeg/lib/processor.js:132:10)
2017-12-11T05:55:48.403922+00:00 app[web.1]: at FfmpegCommand.proto.availableFormats.proto.getAvailableFormats (/app/node_modules/fluent-ffmpeg/lib/capabilities.js:517:10)
2017-12-11T05:55:48.403924+00:00 app[web.1]: at /app/node_modules/fluent-ffmpeg/lib/capabilities.js:568:14
2017-12-11T05:55:48.403924+00:00 app[web.1]: at fn (/app/node_modules/async/lib/async.js:746:34)
2017-12-11T05:55:48.403925+00:00 app[web.1]: at /app/node_modules/async/lib/async.js:1213:16 code: 'EACCES', errno: 'EACCES', syscall: 'spawn' }
2017-12-11T05:56:18.324251+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/download?v=jRGWXq5WVzY" host=ultramendoza-mp3.herokuapp.com request_id=ebf533f1-057f-430d-abcb-6a553b1d1ff8 fwd="201.210.244.119" dyno=web.1 connect=1ms service=30000ms status=503 bytes=0 protocol=https
2017-12-11T05:56:18.327340+00:00 app[web.1]: ::ffff:10.144.205.236 - - [Mon, 11 Dec 2017 05:56:18 GMT] "GET /download?v=jRGWXq5WVzY HTTP/1.1" - - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36"
2017-12-11T05:58:57.415810+00:00 app[web.1]: ::ffff:127.0.0.1 - - [Mon, 11 Dec 2017 05:58:57 GMT] "GET /api/status HTTP/1.1" 200 17 "-" "node-fetch/1.0 (+https://github.com/bitinn/node-fetch)"
2017-12-11T05:58:57.418665+00:00 app[web.1]: Ping response { upTime: 300083 }
2017-12-11T06:03:57.510427+00:00 app[web.1]: ::ffff:127.0.0.1 - - [Mon, 11 Dec 2017 06:03:57 GMT] "GET /api/status HTTP/1.1" 200 17 "-" "node-fetch/1.0 (+https://github.com/bitinn/node-fetch)"
2017-12-11T06:03:57.512242+00:00 app[web.1]: Ping response { upTime: 600176 }