Can't extract title -- fails

[jseg-githb]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2021.12.17
• 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

PASTE VERBOSE LOG HERE

 youtube-dl --verbose https://91porn.com/view_video.php?viewkey=91e9b3cca0e6be1e834f
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://91porn.com/view_video.php?viewkey=91e9b3cca0e6be1e834f']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2021.12.17
[debug] Python version 3.11.8 (CPython) - macOS-10.15.7-x86_64-i386-64bit
[debug] exe versions: ffmpeg N-104236-g21979cf98e-tessus, rtmpdump 2.4
[debug] Proxy map: {}
[91porn] 91e9b3cca0e6be1e834f: Downloading webpage
ERROR: Unable to extract title; 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 "/usr/local/lib/python3.11/site-packages/youtube_dl/YoutubeDL.py", line 815, in wrapper
    return func(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/youtube_dl/YoutubeDL.py", line 836, in __extract_info
    ie_result = ie.extract(url)
                ^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/youtube_dl/extractor/common.py", line 534, in extract
    ie_result = self._real_extract(url)
                ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/youtube_dl/extractor/porn91.py", line 38, in _real_extract
    title = self._search_regex(
            ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/youtube_dl/extractor/common.py", line 1012, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract title; 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.

Description

[dirkf]

#30839

Duplicate of #30089.