youtube_dl.utils.RegexNotFoundError: Unable to extract kaltura reference id ww.safaribooksonline.com/

[vikiaiteam]

youtube-dl -u ****@gmail.com -p **** -v --all-subs -i -c -w -o "C:\youtube-dl-master\downloaded%(playlist)s%(playlist_index)s-%(title)s.%(ext)s" --external-downloader aria2c.exe https://www.safaribooksonline.com/videos/modern-software-engineering/9780134665726 --convert-subs srt
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-u', 'PRIVATE', '-p', 'PRIVATE', '-v', '--all-subs', '-i', '-c', '-w', '-o', 'C:\Bank2020\youtube-dl-master\downloaded\%(playlist)s\%(playlist_index)s-%(title)s.%(ext)s', '--external-downloader', 'aria2c.exe', 'https://www.safaribooksonline.com/videos/modern-software-engineering/9780134665726', '--convert-subs', 'srt']
[debug] Encodings: locale cp1252, fs utf-8, out utf-8, pref cp1252
[debug] youtube-dl version 2018.06.02
[debug] Python version 3.6.5 (CPython) - Windows-10-10.0.17134-SP0
[debug] exe versions: none
[debug] Proxy map: {}
[generic] 9780134665726: Requesting header
[redirect] Following redirect to https://www.safaribooksonline.com/library/view/modern-software-engineering/9780134665726/
[safari:course] Downloading login form
[safari:course] Logging in
[safari:course] 9780134665726: Downloading course JSON
[download] Downloading playlist: Modern Software Engineering: Continuous Delivery and Microservices with .NET (MeasureUP Conference)
[safari:course] playlist Modern Software Engineering: Continuous Delivery and Microservices with .NET (MeasureUP Conference): Collected 11 video ids (downloading 11 of them)
[download] Downloading video 1 of 11
[safari:api] Downloading login form
[safari:api] 9780134665726/MOSE_00: Downloading part JSON
[safari] Downloading login form
[safari] 9780134665726/MOSE_00: Downloading webpage
ERROR: Unable to extract kaltura reference id; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "c:\python36\lib\site-packages\youtube_dl\YoutubeDL.py", line 792, in extract_info
ie_result = ie.extract(url)
File "c:\python36\lib\site-packages\youtube_dl\extractor\common.py", line 500, in extract
ie_result = self._real_extract(url)
File "c:\python36\lib\site-packages\youtube_dl\extractor\safari.py", line 106, in _real_extract
webpage, 'kaltura reference id', group='id')
File "c:\python36\lib\site-packages\youtube_dl\extractor\common.py", line 880, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract kaltura reference id; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.