Can't download youtube mix playlist

[Holi0317]

I was trying to download a youtube mix playlist, https://www.youtube.com/watch?v=gFIyFzZG9hk&list=RDgFIyFzZG9hk, for example. When I paste it to youtube-dl and download them, youtube-dl reports an error.
Log:

▶ youtube-dl -x https://www.youtube.com/watch\?v\=gFIyFzZG9hk\&list\=RDgFIyFzZG9hk
[youtube:playlist] Downloading playlist PLRDgFIyFzZG9hk - add --no-playlist to just download video gFIyFzZG9hk
[youtube:playlist] RDgFIyFzZG9hk: Downloading Youtube mix
Traceback (most recent call last):
File "/usr/bin/youtube-dl", line 6, in
youtube_dl.main()
File "/usr/lib/python2.7/dist-packages/youtube_dl/init.py", line 804, in main
_real_main(argv)
File "/usr/lib/python2.7/dist-packages/youtube_dl/init.py", line 794, in _real_main
retcode = ydl.download(all_urls)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 982, in download
self.extract_info(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 493, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 158, in extract
return self._real_extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1490, in _real_extract
return self._extract_mix(playlist_id)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1464, in _extract_mix
title = clean_html(title_span)
File "/usr/lib/python2.7/dist-packages/youtube_dl/utils.py", line 403, in clean_html
html = html.replace('\n', ' ')
AttributeError: 'NoneType' object has no attribute 'replace'

[jaimeMF]

It works fine here could you post the output of youtube-dl 'https://www.youtube.com/watch?v=gFIyFzZG9hk&list=RDgFIyFzZG9hk' --verbose?

[Holi0317]

▶ youtube-dl 'https://www.youtube.com/watch?v=gFIyFzZG9hk&list=RDgFIyFzZG9hk' --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/watch?v=gFIyFzZG9hk&list=RDgFIyFzZG9hk', '--verbose']
[debug] Encodings: locale 'UTF-8', fs 'UTF-8', out 'UTF-8', pref: 'UTF-8'
[debug] youtube-dl version 2014.02.17
[debug] Python version 2.7.6 - Linux-3.13.0-36-generic-x86_64-with-Ubuntu-14.04-trusty
[debug] Proxy map: {}
[youtube:playlist] Downloading playlist PLRDgFIyFzZG9hk - add --no-playlist to just download video gFIyFzZG9hk
[youtube:playlist] RDgFIyFzZG9hk: Downloading Youtube mix
Traceback (most recent call last):
File "/usr/bin/youtube-dl", line 6, in
youtube_dl.main()
File "/usr/lib/python2.7/dist-packages/youtube_dl/init.py", line 804, in main
_real_main(argv)
File "/usr/lib/python2.7/dist-packages/youtube_dl/init.py", line 794, in _real_main
retcode = ydl.download(all_urls)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 982, in download
self.extract_info(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 493, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 158, in extract
return self._real_extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1490, in _real_extract
return self._extract_mix(playlist_id)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1464, in _extract_mix
title = clean_html(title_span)
File "/usr/lib/python2.7/dist-packages/youtube_dl/utils.py", line 403, in clean_html
html = html.replace('\n', ' ')
AttributeError: 'NoneType' object has no attribute 'replace'

[phihag]

You are using an outdated version of youtube-dl. We tried to document what to do in our FAQ, but here's the gist of it: Either contact the Ubuntu packaging team or run

sudo apt-get remove -y youtube-dl
sudo wget https://yt-dl.org/latest/youtube-dl -O /usr/local/bin/youtube-dl
sudo chmod a+x /usr/local/bin/youtube-dl
hash -r

I'm closing this issue now, but if you have any questions about this problem, feel free to post.