:ytsubs error

[Fluktron]

I want to download my youtube subscriptions with "youtube-dl -u [username] -p [password] :ytsubs" but I get this error:

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-u', '', '-p', '', ':ytsubs', '--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.07.20
[debug] Python version 2.7.3 - Linux-3.12.22+-armv6l-with-debian-7.5
[debug] Proxy map: {}
[youtube:subscriptions] Downloading login page
[youtube:subscriptions] Logging in
[youtube:subscriptions] subscriptions feed: Downloading page 1
ERROR: Unable to download JSON metadata: HTTP Error 400: Bad Request; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 201, in _request_webpage
return self._downloader.urlopen(url_or_request)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 1227, in urlopen
return self._opener.open(req, timeout=self._socket_timeout)
File "/usr/lib/python2.7/urllib2.py", line 407, in open
response = meth(req, response)
File "/usr/lib/python2.7/urllib2.py", line 520, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python2.7/urllib2.py", line 445, in error
return self._call_chain(_args)
File "/usr/lib/python2.7/urllib2.py", line 379, in _call_chain
result = func(_args)
File "/usr/lib/python2.7/urllib2.py", line 528, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

[jaimeMF]

Duplicate of #2975.