[SOLVED] Voxeet sample app started but visiting https://localhost:8080 shows an error

Voxeet sample app started but visiting https://localhost:8080 shows an error

I've signed up voxeet and got my consumer key for trials.

And I added consumerKey and consumerSecret key to my VoxeetConference.js and started yarn:

$ yarn start

yarn run v1.19.0
$ webpack-dev-server -d --hot --inline --content-base
Project is running at https://localhost:8080/
webpack output is served from /      // ... omitted from here

It said that the project was running at localhost, but when I tried to visit localhost it showed the following errors and failed:

OutgoingMessage.prototype._headers is deprecated
internal/buffer.js:940 class FastBuffer extends Uint8Array {} ^

RangeError: Invalid typed array length: -4095 at new Uint8Array () at
new FastBuffer (internal/buffer.js:940:1) at Handle.onStreamRead [as
onread] (internal/stream_base_commons.js:181:19) at Stream.
(E:\kjy\itinerary\02_source\voxeet\node_modules\handle-thing\lib\handle.js:120:12)
at Stream.emit (events.js:215:7) at endReadableNT
(E:\kjy\itinerary\02_source\voxeet\node_modules\readable-stream\lib_stream_readable.js:1010:12)
at processTicksAndRejections (internal/process/task_queues.js:80:21)
error Command failed with exit code 1. info Visit
https://yarnpkg.com/en/docs/cli/run for documentation about this
command. ```

My npm version is 6.11.3 and node version is 12.11.1 and yarn version is 1.19.0.

Can anyone tell me what's wrong here?

Solution