Traceback (most recent call last):


 "/home/ant/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info

ie_result = ie.extract(url)


 "/home/ant/bin/youtube-dl/youtube_dl/extractor/common.py", line 514, in extract

raise ExtractorError('An extractor error has occurred.', cause=e)
youtube_dl.utils.ExtractorError: An extractor error has occurred. (caused by KeyError('DVzl9QRzox3ZZsP9bNu5Li3X7obQOnqP',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type
youtube-dl -U
to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):


 "/home/asan/.Virtualenvs/sciprog/lib/python3.5/site-packages/visdom/__init__.py", line 240, in _send

data=json.dumps(msg),


 "/usr/lib/python3.5/json/__init__.py", line 230, in dumps

return _default_encoder.encode(obj)


 "/usr/lib/python3.5/json/encoder.py", line 198, in encode

chunks = self.iterencode(o, _one_shot=True)


 "/usr/lib/python3.5/json/encoder.py", line 256, in iterencode

return _iterencode(o, 0)
TypeError: keys must be a string
