Pluralsight: subtitles download is no longer working, again.

[rgmorato]

• [X ] I've verified and I assure that I'm running youtube-dl 2018.09.26

Before submitting an issue make sure you have:

• [ X] At least skimmed through the README, most notably the FAQ and BUGS sections
• [ X] Searched the bugtracker for similar issues including closed ones
• [ X] Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• [ X] 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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/usr/bin/python3 /usr/local/bin/youtube-dl -v -u USER -p PASSWORD -o '%(playlist_title)s/%(chapter_number)s - %(chapter)s/%(playlist_index)s-%(title)s.%(ext)s' --min-sleep-interval 30 --max-sleep-interval 120 --all-subs "URL"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-u', 'PRIVATE', '-p', 'PRIVATE', '-o', '%(playlist_title)s/%(chapter_number)s - %(chapter)s/%(playlist_index)s-%(title)s.%(ext)s', '--min-sleep-interval', '30', '--max-sleep-interval', '120', '--all-subs', 'URL']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.09.26
[debug] Python version 3.6.6 (CPython) - Linux-4.4.0-17763-Microsoft-x86_64-with-Ubuntu-18.04-bionic
[debug] exe versions: ffmpeg 3.4.4-0ubuntu0.18.04.1, ffprobe 3.4.4-0ubuntu0.18.04.1, phantomjs ., rtmpdump 2.4
[debug] Proxy map: {}
[pluralsight:course] FILE: Downloading JSON metadata
[download] Downloading playlist: TITLE
[pluralsight:course] playlist TITLE Collected 45 video ids (downloading 45 of them)
[download] Downloading video 1 of 45
[pluralsight] Downloading login page
[pluralsight] Logging in
[pluralsight] 713b6b4e-f019-41f2-9b8a-a79b0dde58c4-0: Downloading JSON metadata
[pluralsight] 713b6b4e-f019-41f2-9b8a-a79b0dde58c4-0: Downloading mp4-high-widescreen viewclip graphql
[pluralsight] 713b6b4e-f019-41f2-9b8a-a79b0dde58c4-0: Waiting for 3 seconds to avoid throttling
[pluralsight] 713b6b4e-f019-41f2-9b8a-a79b0dde58c4-0: Downloading captions JSON
WARNING: Unable to download captions JSON: HTTP Error 404: Not Found
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on 'URL.mp4'
[download] Sleeping 51.78 seconds...
[download] 100% of 6.06MiB in 00:08
[download] Downloading video 2 of 45

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After updating youtube-dl with the issue # 17671, I was able to download subtitles for a while. Since Monday, the download of subtitles has failed again.
Thank you.

[rgmorato]

I purposely omitted the URLs and filenames that were being downloaded. I will provide in private the user name and password for access and simulation of the problem.

[rgmorato]

Please, what issue IDs can I check for this my problem, which was marked as duplicate and closed?