[slideslive.com] Unsupported service name: url

[Jendker]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.11.28
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

youtube-dl https://slideslive.com/38922025/deep-reinforcement-learning-1
[SlidesLive] 38922025: Downloading JSON metadata
ERROR: Unsupported service name: url
➜ Downloads youtube-dl https://slideslive.com/38922025/deep-reinforcement-learning-1 --verbose
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://slideslive.com/38922025/deep-reinforcement-learning-1', u'--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.11.28
[debug] Python version 2.7.17 (CPython) - Darwin-19.2.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1, rtmpdump 2.4
[debug] Proxy map: {}
[SlidesLive] 38922025: Downloading JSON metadata
ERROR: Unsupported service name: url
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract_info
ie_result = ie.extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 530, in extract
ie_result = self._real_extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/slideslive.py", line 46, in _real_extract
'Unsupported service name: {0}'.format(service_name), expected=True)
ExtractorError: Unsupported service name: url

Description

I have built the new version from master, I have problem for some links as seen in the log.
Other links would be (with same or different errors):
https://slideslive.com/38921896/retrospectives-a-venue-for-selfreflection-in-ml-research-3
https://slideslive.com/38922037/do-the-right-thing-machine-learning-and-causal-inference-for-improved-decision-making-1
https://slideslive.com/38922070/learning-transferable-skills-1