Could not find JS function on MacOSX Big Sur

[inquisitivefrog]

Checklist

• [ x] I'm reporting a broken site support issue
• [x ] I've verified that I'm running youtube-dlc version 2020.10.31
• [ x] I've checked that all provided URLs are alive and playable in a browser
• [x ] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [x ] I've searched the bugtracker for similar bug reports including closed ones
• [x ] I've read bugs section in FAQ

Verbose log

frog@My-MacBook-Pro wild_kratts % ../youtube-dlc -v 'https://www.youtube.com/watch?v=iyAefH3Bw1c'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.youtube.com/watch?v=iyAefH3Bw1c']
[debug] Loading archive file None
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dlc version 2020.11.11-3
[debug] Python version 2.7.16 (CPython) - Darwin-20.6.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] iyAefH3Bw1c: Downloading webpage
[youtube] {18} signature length 104, html5 player f3c4e04d
[youtube] iyAefH3Bw1c: Downloading player https://www.youtube.com/s/player/f3c4e04d/player_ias.vflset/en_US/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1395, in _decrypt_signature
    video_id, player_url, s
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1295, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1370, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "../youtube-dlc/youtube_dlc/jsinterp.py", line 245, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type  youtube-dlc -U  to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
 (caused by ExtractorError(u"Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type  youtube-dlc -U  to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.",)); please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type  youtube-dlc -U  to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1395, in _decrypt_signature
    video_id, player_url, s
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1295, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1370, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "../youtube-dlc/youtube_dlc/jsinterp.py", line 245, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type  youtube-dlc -U  to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "../youtube-dlc/youtube_dlc/YoutubeDL.py", line 830, in extract_info
    ie_result = ie.extract(url)
  File "../youtube-dlc/youtube_dlc/extractor/common.py", line 532, in extract
    ie_result = self._real_extract(url)
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 2202, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1405, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1395, in _decrypt_signature
    video_id, player_url, s
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1295, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "../youtube-dlc/youtube_dlc/extractor/youtube.py", line 1370, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "../youtube-dlc/youtube_dlc/jsinterp.py", line 245, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type  youtube-dlc -U  to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
 (caused by ExtractorError(u"Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type  youtube-dlc -U  to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.",)); please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type  youtube-dlc -U  to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.

frog@My-MacBook-Pro wild_kratts % ../youtube-dlc --version
2020.11.11-3
tim@Tims-MacBook-Pro wild_kratts % sw_vers
ProductName:	macOS
ProductVersion:	11.6
BuildVersion:	20G165

Description

File failed to download due to Could Not find JS function error.

[000011111111]

I am getting the same JS function error on macOS 12.1
youtube-dlc version 2020.11.11-3

######## Verbose bug info below

bash-3.2# youtube-dlc -x --audio-format mp3 https://youtu.be/UXUwLyX6sUg
[youtube] UXUwLyX6sUg: Downloading webpage
[youtube] UXUwLyX6sUg: Downloading js player f3c4e04d
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1395, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1295, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1370, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/local/bin/youtube-dlc/youtube_dlc/jsinterp.py", line 245, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
(caused by ExtractorError(u"Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.",)); please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
bash-3.2# youtube-dlc -v -x --audio-format mp3 https://youtu.be/UXUwLyX6sUg
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'-x', u'--audio-format', u'mp3', u'https://youtu.be/UXUwLyX6sUg']
[debug] Loading archive file None
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dlc version 2020.11.11-3
[debug] Python version 2.7.18 (CPython) - Darwin-21.2.0-arm64-arm-64bit
[debug] exe versions: ffmpeg 4.3.2, ffprobe 4.3.2
[debug] Proxy map: {}
[youtube] UXUwLyX6sUg: Downloading webpage
[youtube] {18} signature length 104, html5 player f3c4e04d
[youtube] UXUwLyX6sUg: Downloading player https://www.youtube.com/s/player/f3c4e04d/player_ias.vflset/en_US/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1395, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1295, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1370, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/local/bin/youtube-dlc/youtube_dlc/jsinterp.py", line 245, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
(caused by ExtractorError(u"Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.",)); please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1395, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1295, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1370, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/local/bin/youtube-dlc/youtube_dlc/jsinterp.py", line 245, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/local/bin/youtube-dlc/youtube_dlc/YoutubeDL.py", line 830, in extract_info
ie_result = ie.extract(url)
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/common.py", line 532, in extract
ie_result = self._real_extract(url)
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 2202, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1405, in _decrypt_signature
'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1395, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1295, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dlc/youtube_dlc/extractor/youtube.py", line 1370, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/local/bin/youtube-dlc/youtube_dlc/jsinterp.py", line 245, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.
(caused by ExtractorError(u"Could not find JS function u'na'; please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.",)); please report this issue on https://github.com/blackjack4494/yt-dlc . Make sure you are using the latest version; type youtube-dlc -U to update. Be sure to call youtube-dlc with the --verbose flag and include its complete output.

bct@2021 bashScripts % sw_vers
ProductName: macOS
ProductVersion: 12.1
BuildVersion: 21C52

[000011111111]

I switched to yt-dlp and got things working again.

Install and demo workflow linked here: https://youtu.be/dAc5VIDIs5k