[dfb] AttributeError: 'NoneType' object has no attribute 'find'

[ghost]

• I've verified and I assure that I'm running youtube-dl 2018.01.14

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

http://tv.dfb.de/video/u-19-em-stimmen-zum-spiel-gegen-russland/11633/

Traceback (most recent call last):
  File "/usr/bin/youtube-dl", line 11, in <module>
    load_entry_point('youtube-dl==2018.1.14', 'console_scripts', 'youtube-dl')()
  File "/usr/lib/python3/dist-packages/youtube_dl/__init__.py", line 465, in main
    _real_main(argv)
  File "/usr/lib/python3/dist-packages/youtube_dl/__init__.py", line 455, in _real_main
    retcode = ydl.download(all_urls)
  File "/usr/lib/python3/dist-packages/youtube_dl/YoutubeDL.py", line 1988, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "/usr/lib/python3/dist-packages/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 438, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/dfb.py", line 32, in _real_extract
    stream_access_url = self._proto_relative_url(video_info.find('url').text.strip())
AttributeError: 'NoneType' object has no attribute 'find'