mediasoup_sample Not working due to Rtcpeerconnection of undefined.

_2018-08-23T07:13:47.874323+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=glacial-mesa-51801.herokuapp.com request_id=f4fbca96-eca9-4f5e-9ad8-e947e9518220 fwd="175.111.131.179" dyno= connect= service= status=503 bytes= protocol=https 2018-08-23T07:16:20.246950+00:00 heroku[run.9819]: State changed from up to complete 2018-08-23T07:16:20.227548+00:00 heroku[run.9819]: Process exited with status 0 2018-08-23T07:16:31.952638+00:00 app[api]: Starting process with command bash by user [email protected] 2018-08-23T07:16:39.868799+00:00 heroku[run.7193]: Awaiting client 2018-08-23T07:16:39.888509+00:00 heroku[run.7193]: Starting process with command bash 2018-08-23T07:16:40.222233+00:00 heroku[run.7193]: State changed from starting to up 2018-08-23T07:18:26.662227+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=glacial-mesa-51801.herokuapp.com request_id=ecc3d280-3197-454b-8521-76eaf7446518 fwd="175.111.131.179" dyno= connect= service= status=503 bytes= protocol=https 2018-08-23T07:18:27.060421+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=glacial-mesa-51801.herokuapp.com request_id=630a5c19-642c-4266-bd6e-2beab8e4776b fwd="175.111.131.179" dyno= connect= service= status=503 bytes= protocol=https 2018-08-23T07:20:43.000000+00:00 app[api]: Build started by user [email protected] 2018-08-23T07:21:19.887398+00:00 heroku[web.1]: State changed from crashed to starting 2018-08-23T07:21:19.651895+00:00 app[api]: Deploy a88b7963 by user [email protected] 2018-08-23T07:21:19.651895+00:00 app[api]: Release v6 created by user [email protected] 2018-08-23T07:21:27.687069+00:00 heroku[web.1]: Starting process with command npm start 2018-08-23T07:21:29.848072+00:00 app[web.1]: [heroku-exec] Starting 2018-08-23T07:21:30.230469+00:00 app[web.1]: 2018-08-23T07:21:30.230507+00:00 app[web.1]: > [email protected] start /app 2018-08-23T07:21:30.230508+00:00 app[web.1]: > node mediasoup_sample_socketio.js 2018-08-23T07:21:30.230509+00:00 app[web.1]: 2018-08-23T07:21:30.454007+00:00 app[web.1]: /app/mediasoup_sample_socketio.js:21 2018-08-23T07:21:30.454010+00:00 app[web.1]: const RTCPeerConnection = mediasoup.webrtc.RTCPeerConnection; 2018-08-23T07:21:30.454012+00:00 app[web.1]: ^ 2018-08-23T07:21:30.454013+00:00 app[web.1]: 2018-08-23T07:21:30.454015+00:00 app[web.1]: ```

**

TypeError: Cannot read property 'RTCPeerConnection' of undefined**


2018-08-23T07:21:30.454016+00:00 app[web.1]: at Object.<anonymous> (/app/mediasoup_sample_socketio.js:21:44)
2018-08-23T07:21:30.454017+00:00 app[web.1]: at Module._compile (module.js:652:30)
2018-08-23T07:21:30.454020+00:00 app[web.1]: at Module.load (module.js:565:32)
2018-08-23T07:21:30.454018+00:00 app[web.1]: at Object.Module._extensions..js (module.js:663:10)
2018-08-23T07:21:30.454021+00:00 app[web.1]: at tryModuleLoad (module.js:505:12)
2018-08-23T07:21:30.454023+00:00 app[web.1]: at Function.Module.runMain (module.js:693:10)
2018-08-23T07:21:30.454024+00:00 app[web.1]: at startup (bootstrap_node.js:191:16)
2018-08-23T07:21:30.454022+00:00 app[web.1]: at Function.Module._load (module.js:497:3)
2018-08-23T07:21:30.461198+00:00 app[web.1]: npm ERR! Exit status 1
2018-08-23T07:21:30.459642+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2018-08-23T07:21:30.454026+00:00 app[web.1]: at bootstrap_node.js:612:3
2018-08-23T07:21:30.459938+00:00 app[web.1]: npm ERR! errno 1
2018-08-23T07:21:30.461386+00:00 app[web.1]: npm ERR!
2018-08-23T07:21:30.461520+00:00 app[web.1]: npm ERR! Failed at the [email protected] start script.
2018-08-23T07:21:30.461094+00:00 app[web.1]: npm ERR! [email protected] start: `node mediasoup_sample_socketio.js`
2018-08-23T07:21:30.461648+00:00 app[web.1]: npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2018-08-23T07:21:30.468258+00:00 app[web.1]: 
2018-08-23T07:21:30.468394+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2018-08-23T07:21:30.468486+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2018-08-23T07_21_30_462Z-debug.log
2018-08-23T07:21:30.531976+00:00 heroku[web.1]: State changed from starting to crashed
2018-08-23T07:21:30.517250+00:00 heroku[web.1]: Process exited with status 1
2018-08-23T07:21:36.000000+00:00 app[api]: Build succeeded
2018-08-23T07:21:56.181906+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=glacial-mesa-51801.herokuapp.com request_id=708f3478-bc23-4a0f-8602-10d6f302a006 fwd="175.111.131.179" dyno= connect= service= status=503 bytes= protocol=https
2018-08-23T07:21:57.308101+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=glacial-mesa-51801.herokuapp.com request_id=dc7d09e4-9653-41ac-b325-fae2a6677398 fwd="175.111.131.179" dyno= connect= service= status=503 bytes= protocol=https


Getting this while uploading on heroku server.

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