youtube ERROR: Signature extraction failed

[ma1us]

I have sam problem with Nyan Trololol:

youtube-dl -F "https://www.youtube.com/watch?v=zqan54VUSq0" --verbose
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-F', 'https://www.youtube.com/watch?v=zqan54VUSq0', '--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.03.14
[debug] Python version 3.6.7 (CPython) - Linux-4.15.0-42-generic-x86_64-with-Ubuntu-18.04-bionic
[debug] exe versions: ffmpeg 3.4.4-0ubuntu0.18.04.1, ffprobe 3.4.4-0ubuntu0.18.04.1, phantomjs ., rtmpdump 2.4
[debug] Proxy map: {}
[youtube] zqan54VUSq0: Downloading webpage
[youtube] zqan54VUSq0: Downloading video info webpage
[youtube] zqan54VUSq0: Extracting video information
WARNING: unable to extract html5 player; 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.
[youtube] {18} signature length 43.40, html5 player None
[youtube] zqan54VUSq0: Downloading player https://www.youtube.com/yts/jsbin/player_ias-vfl_235rs/en_US/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1191, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1102, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1163, in _parse_sig_js
    jscode, 'Initial JS player signature function name', group='sig')
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 796, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; 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.
 (caused by RegexNotFoundError('Unable to extract \x1b[0;34mInitial JS player signature function name\x1b[0m; 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.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1191, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1102, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1163, in _parse_sig_js
    jscode, 'Initial JS player signature function name', group='sig')
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 796, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; 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.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1191, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1102, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1163, in _parse_sig_js
    jscode, 'Initial JS player signature function name', group='sig')
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 796, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; 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.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/youtube_dl/YoutubeDL.py", line 785, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 440, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1899, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1201, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1191, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1102, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1163, in _parse_sig_js
    jscode, 'Initial JS player signature function name', group='sig')
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 796, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; 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.
 (caused by RegexNotFoundError('Unable to extract \x1b[0;34mInitial JS player signature function name\x1b[0m; 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.`

youtube-dl --version
2018.03.14

[ma1us]

Sorry, old version in Ubuntu reps.
Unistall via apt |Update via pip.
its work whell