SyntaxError: Unexpected token # in JSON at position 0 -aria2 branch

[davide-butera]

OS: WSL (with access token recycled from a windows instance)

Launch command used: /usr/bin/node ./build/src/destreamer.js -i [group link]
(the command works in the main branch)

Verbose log

[VERBOSE] Using ffmpeg version 4.4.1-3ubuntu5 Copyright (c) 2000-2021 the FFmpeg developers
[VERBOSE] Using aria2 version 1.36.0

Access token still good for 36 minutes.

[VERBOSE] Session and API info
         API Gateway URL: https://euno-1.api.microsoftstream.com/api/
         API Gateway version: 1.4-private

Parsing video/group urls
[ERROR] 27
[VERBOSE] List of videos and corresponding output directory
....
Downloading video info, this might take a while...
Trying to launch and connect to aria2c...

Connected to aria2 daemon!

Downloading video no.1

progress [░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░] 0%   0 MB/s   0s
[ERROR] Error while downloading, retrying...
[ERROR] Error while downloading, retrying...
[ERROR] Error while downloading, retrying...
[ERROR] undefined
[FATAL ERROR] Unhandled error or uncaught exception!

The node debugger gives an exception at

SyntaxError: Unexpected token # in JSON at position 0
  at JSON.parse (<anonymous>)
    at Object.transformResponse (/home/cacio/destreamer/node_modules/axios/lib/defaults.js:89:21)
    at transform (/home/cacio/destreamer/node_modules/axios/lib/core/transformData.js:18:15)
    at Object.forEach (/home/cacio/destreamer/node_modules/axios/lib/utils.js:245:10)
    at Object.transformData (/home/cacio/destreamer/node_modules/axios/lib/core/transformData.js:17:9)
    at onAdapterResolution (/home/cacio/destreamer/node_modules/axios/lib/core/dispatchRequest.js:57:35)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async downloadVideo (/home/cacio/destreamer/build/src/destreamer.js:163:27)
    at async main (/home/cacio/destreamer/build/src/destreamer.js:299:5)

the data it tries to transform is in src/destreamer.ts, at line 213
masterParser.push(await apiClient.callUrl(video.playbackUrl).then(res => res?.data));```` {status: 200, statusText: 'OK', headers: {…}, config: {…}, request: ClientRequest, …}data:#EXTM3U\r\n#EXT-X-VERSION:4\r\n#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",NAME="aac_eng_2_128_1_1",LANGUAGE="eng",DEFAULT=YES,AUTOSELECT=YES,URI="https://euno-1....\r\n'``` (I don't know if the uri contains private information so I censored the rest
anyway, it expects a JSON but it starts with a #
)