Error in youtube-dl

[paulwscom]

{
"error": "ERROR: Signature extraction failed: Traceback (most recent call last):\n File "/app/.heroku/python/lib/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 1070, in _decrypt_signature\n video_id, player_url, s\n File "/app/.heroku/python/lib/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 958, in _extract_signature_function\n raise ExtractorError('Cannot identify player %r' % player_url)\nExtractorError: Cannot identify player u'https://www.youtube.com/yts/jsbin/player-vfl4Xq3l4/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.\n (caused by ExtractorError(u"Cannot identify player u'https://www.youtube.com/yts/jsbin/player-vfl4Xq3l4/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output."
}