Error 500 when using 2FA on YouTube

[federicochiesa]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.11.07. 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 Issues with outdated version will be rejected.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 2018.11.07

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• 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)
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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--download-archive', u'downloaded.txt', u'--username', u'PRIVATE', u'-v', u'https://www.youtube.com/playlist?list=FLP7ZW4sUTNhlTUhTAinYv9w']
Type account password and press [Return]: 
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.11.07
[debug] Python version 2.7.10 (CPython) - Darwin-18.0.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.1, ffprobe 4.1
[debug] Proxy map: {}
[youtube:playlist] Downloading login page
[youtube:playlist] Looking up account info
[youtube:playlist] Logging in
Type 2-step verification code and press [Return]: 
[youtube:playlist] Submitting TFA code
WARNING: Unable to submit TFA code: HTTP Error 500: Internal Server Error
[youtube:playlist] FLP7ZW4sUTNhlTUhTAinYv9w: Downloading webpage
ERROR: This playlist is private, use --username or --netrc to access it.
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 508, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 2454, in _real_extract
    has_videos, playlist = self._extract_playlist(playlist_id)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 2377, in _extract_playlist
    raise ExtractorError(message, expected=True)
ExtractorError: This playlist is private, use --username or --netrc to access it.

Description of your issue, suggested solution and other information

I can't download my private playlists because there appears to be a server error when putting in the 2FA code. I checked and the credentials are all correct and the version is up to date.

[eduardog3000]

Duplicate of #15184, there's a PR to fix it at #18521.