Download audio-only youtube playlist pyhton error

[edunet22]

When trying to download a full playlist (extracting audio) I get:

youtube-dl -x https://www.youtube.com/playlist?list=PL341B28E45B285778 --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-x', 'https://www.youtube.com/playlist?list=PL341B28E45B285778', '--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.11.10
[debug] Python version 3.5.0 - Linux-4.2.5-1-ARCH-x86_64-with-arch
[debug] exe versions: ffmpeg 2.8.2, ffprobe 2.8.2, rtmpdump 2.4
[debug] Proxy map: {}
[youtube:playlist] PL341B28E45B285778: Downloading webpage
ERROR: Unable to extract title; 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/python3.5/site-packages/youtube_dl/YoutubeDL.py", line 661, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python3.5/site-packages/youtube_dl/extractor/common.py", line 290, in extract
return self._real_extract(url)
File "/usr/lib/python3.5/site-packages/youtube_dl/extractor/youtube.py", line 1644, in _real_extract
return self._extract_playlist(playlist_id)
File "/usr/lib/python3.5/site-packages/youtube_dl/extractor/youtube.py", line 1619, in _extract_playlist
page, 'title')
File "/usr/lib/python3.5/site-packages/youtube_dl/extractor/common.py", line 593, in _html_search_regex
res = self._search_regex(pattern, string, name, default, fatal, flags, group)
File "/usr/lib/python3.5/site-packages/youtube_dl/extractor/common.py", line 584, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract title; 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.

[dstftw]

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