Error with prosiebensat1 plugin - "Unable to extract OpenGraph title"

[m0r0n]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.03.26.1. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2018.03.26.1

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
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

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

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youtube-dl --verbose https://www.prosieben.de/tv/late-night-berlin-mit-klaas-heufer-umlauf/video/13-ganze-folge-late-night-berlin-3-ganze-folge
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--verbose', u'https://www.prosieben.de/tv/late-night-berlin-mit-klaas-heufer-umlauf/video/13-ganze-folge-late-night-berlin-3-ganze-folge']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.03.26.1
[debug] Python version 2.7.13 (CPython) - Linux-4.9.0-6-amd64-x86_64-with-debian-9.4
[debug] exe versions: ffmpeg 3.4.2-static, ffprobe 3.4.2-static
[debug] Proxy map: {}
[prosiebensat1] tv/late-night-berlin-mit-klaas-heufer-umlauf/video/13-ganze-folge-late-night-berlin-3-ganze-folge: Downloading webpage
ERROR: Unable to extract OpenGraph title; 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):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 785, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 440, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/prosiebensat1.py", line 450, in _real_extract
    return self._extract_clip(url, webpage)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/prosiebensat1.py", line 398, in _extract_clip
    default=None) or self._og_search_title(webpage)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 920, in _og_search_title
    return self._og_search_property('title', html, **kargs)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 908, in _og_search_property
    escaped = self._search_regex(og_regexes, html, name, flags=re.DOTALL, **kargs)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 808, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract OpenGraph title; 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.

Description of your issue, suggested solution and other information

Download was possible only a few days ago, but now all videos will bring up the same error message. Other examples:

https://www.prosieben.de/tv/late-night-berlin-mit-klaas-heufer-umlauf/video/12-ganze-folge-late-night-berlin-2-ganze-folge
https://www.prosieben.de/tv/germanys-next-topmodel/video/136-staffel-13-episode-6-gntm-hip-hop-edition-ganze-folge