ExtractorError: Could not find JS function u'Go.sH' / Automatic signature extraction failed

[PotcFdk]

This has happened to some videos for me; below an example:

E:\YouTube>youtube-dl.exe https://www.youtube.com/user/ATeensVEVO --verbose -F
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/user/ATeensVEVO', '--verbose', '-F']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2014.07.24
[debug] Python version 2.7.8 - Windows-7-6.1.7601-SP1
[debug] Proxy map: {}
[download] Downloading playlist: ATeensVEVO
[youtube:user] ATeensVEVO: Downloading video ids from 1 to 51
[youtube:user] playlist ATeensVEVO: Downloading 10 videos
[download] Downloading video #1 of 10
[youtube] Setting language
[youtube] 4TQbr244IPs: Downloading webpage
[youtube] 4TQbr244IPs: Downloading video info webpage
[youtube] 4TQbr244IPs: Extracting video information
[youtube] 4TQbr244IPs: Encrypted signatures detected.
[youtube] encrypted signature length 84 (28.55), itag 43, html5 player en_US-vflCGk6yw\/html5player
[youtube] 4TQbr244IPs: Downloading js player vflCGk6yw
WARNING: Writing cache to u'C:\\Users\\{{WINDOWS-USERNAME}}/.cache\\youtube-dl\\youtube-sigfuncs\\js_vflCGk6yw_84.json' failed: Traceback (most recent call last):
  File "youtube_dl\extractor\youtube.pyo", line 392, in _extract_signature_function
  File "youtube_dl\extractor\youtube.pyo", line 450, in <lambda>
  File "youtube_dl\jsinterp.pyo", line 179, in resf
  File "youtube_dl\jsinterp.pyo", line 48, in interpret_statement
  File "youtube_dl\jsinterp.pyo", line 140, in interpret_expression
  File "youtube_dl\jsinterp.pyo", line 170, in extract_function
ExtractorError: Could not find JS function u'Go.sH'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.

ERROR: Automatic signature extraction failed: Traceback (most recent call last):

  File "youtube_dl\extractor\youtube.pyo", line 477, in _decrypt_signature
  File "youtube_dl\extractor\youtube.pyo", line 450, in <lambda>
  File "youtube_dl\jsinterp.pyo", line 179, in resf
  File "youtube_dl\jsinterp.pyo", line 48, in interpret_statement
  File "youtube_dl\jsinterp.pyo", line 140, in interpret_expression
  File "youtube_dl\jsinterp.pyo", line 170, in extract_function
ExtractorError: Could not find JS function u'Go.sH'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "youtube_dl\extractor\youtube.pyo", line 477, in _decrypt_signature
  File "youtube_dl\extractor\youtube.pyo", line 450, in <lambda>
  File "youtube_dl\jsinterp.pyo", line 179, in resf
  File "youtube_dl\jsinterp.pyo", line 48, in interpret_statement
  File "youtube_dl\jsinterp.pyo", line 140, in interpret_expression
  File "youtube_dl\jsinterp.pyo", line 170, in extract_function
ExtractorError: Could not find JS function u'Go.sH'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.Traceback (most recent call last):
  File "youtube_dl\YoutubeDL.pyo", line 516, in extract_info
  File "youtube_dl\extractor\common.pyo", line 169, in extract
  File "youtube_dl\extractor\youtube.pyo", line 848, in _real_extract
  File "youtube_dl\extractor\youtube.pyo", line 481, in _decrypt_signature
ExtractorError: Automatic signature extraction failed: Traceback (most recent call last):
  File "youtube_dl\extractor\youtube.pyo", line 477, in _decrypt_signature
  File "youtube_dl\extractor\youtube.pyo", line 450, in <lambda>
  File "youtube_dl\jsinterp.pyo", line 179, in resf
  File "youtube_dl\jsinterp.pyo", line 48, in interpret_statement
  File "youtube_dl\jsinterp.pyo", line 140, in interpret_expression
  File "youtube_dl\jsinterp.pyo", line 170, in extract_function
ExtractorError: Could not find JS function u'Go.sH'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.

[PotcFdk]

Whoops, duplicate of #3353 and #3354.