Error with Simpsonsworld.com / FXNetworks

[notoriousdds]

I used youtube-dl to successfully download one episode from simpsonsworld.com yesterday afternoon. However, by yesterday evening, the same exact command was yielding the following error. Thank you for your consideration.

~/Desktop/temp/Simpsons$ youtube-dl -U
youtube-dl is up-to-date (2018.01.07)

~/Desktop/temp/Simpsons$ youtube-dl --ap-mso Charter_Direct --ap-username blahblah@charter.net --ap-password blahblah --verbose http://www.simpsonsworld.com/video/273376835817
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--ap-mso', u'Charter_Direct', u'--ap-username', u'PRIVATE', u'--ap-password', u'PRIVATE', u'--verbose', u'http://www.simpsonsworld.com/video/273376835817']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.01.07
[debug] Python version 2.7.12 (CPython) - Linux-4.4.0-104-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: avconv N-80901-gfebc862, avprobe N-80901-gfebc862, ffmpeg N-80901-gfebc862, ffprobe N-80901-gfebc862, rtmpdump 2.4
[debug] Proxy map: {}
[FXNetworks] 273376835817: Downloading webpage
[FXNetworks] 273376835817: Downloading Provider Redirect Page
[FXNetworks] 273376835817: Downloading Provider Login Page
[FXNetworks] 273376835817: Logging in
[FXNetworks] 273376835817: Confirming Login
[FXNetworks] 273376835817: Retrieving Session

ERROR: Unable to download webpage: HTTP Error 401: Unauthorized (caused by HTTPError()); 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.
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 517, in _request_webpage
return self._downloader.urlopen(url_or_request)
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2198, in urlopen
return self._opener.open(req, timeout=self._socket_timeout)
File "/usr/lib/python2.7/urllib2.py", line 435, in open
response = meth(req, response)
File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python2.7/urllib2.py", line 473, in error
return self._call_chain(*args)
File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 556, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

[Mr-Jake]

I also get the same error when I try Simpsonsworld. The problem seems to be youtube-dl can no longer login when authentication is necessary using --ap-mso or --cookies.

This is similar to the issue I posted #15198