Error when downloading and converting to mp3 from youtube

[mihaiphilip]

ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1232, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1140, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1204, 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 983, 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.

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--extract-audio', '--audio-format', 'mp3', 'https://www.youtube.com/watch?v=ezSD8F5zQqk', '--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.01.17
[debug] Python version 3.7.3 (CPython) - Linux-5.0.0-23-generic-x86_64-with-Ubuntu-19.04-disco
[debug] exe versions: ffmpeg 4.1.3, ffprobe 4.1.3, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] ezSD8F5zQqk: Downloading webpage
[youtube] ezSD8F5zQqk: Downloading video info webpage