VVVVID: HTTP 403 (fail to get m3u8 information)

[CoffeeStraw]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2021.03.14
• 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

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.vvvvid.it/show/393/the-office']
[debug] Encodings: locale cp1252, fs utf-8, out utf-8, pref cp1252
[debug] youtube-dl version 2021.03.14
[debug] Python version 3.9.1 (CPython) - Windows-10-10.0.19041-SP0
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1
[debug] Proxy map: {}
[VVVVIDShow] Downloading JSON metadata
[VVVVIDShow] the-office: Downloading JSON metadata
[VVVVIDShow] the-office: Downloading JSON metadata
[download] Downloading playlist: The Office
[VVVVIDShow] playlist The Office: Collected 12 video ids (downloading 12 of them)
[download] Downloading video 1 of 12
[VVVVID] Downloading JSON metadata
[VVVVID] 486288: Downloading JSON metadata
[VVVVID] 486288: Downloading JSON metadata
[VVVVID] 486288: Downloading f4m manifest
[VVVVID] 486288: Downloading m3u8 information
WARNING: Failed to download m3u8 information: HTTP Error 403: Forbidden
ERROR: No video formats found; 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 "c:\users\antonio\appdata\local\programs\python\python39\lib\site-packages\youtube_dl\YoutubeDL.py", line 806, in wrapper
    return func(self, *args, **kwargs)
  File "c:\users\antonio\appdata\local\programs\python\python39\lib\site-packages\youtube_dl\YoutubeDL.py", line 827, in __extract_info
    ie_result = ie.extract(url)
  File "c:\users\antonio\appdata\local\programs\python\python39\lib\site-packages\youtube_dl\extractor\common.py", line 534, in extract
    ie_result = self._real_extract(url)
  File "c:\users\antonio\appdata\local\programs\python\python39\lib\site-packages\youtube_dl\extractor\vvvvid.py", line 211, in _real_extract
    self._sort_formats(formats)
  File "c:\users\antonio\appdata\local\programs\python\python39\lib\site-packages\youtube_dl\extractor\common.py", line 1369, in _sort_formats
    raise ExtractorError('No video formats found')
youtube_dl.utils.ExtractorError: No video formats found; 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

I can't download some series, since they fail in getting m3u8 information. As you can see from the log, I've tried to download https://www.vvvvid.it/show/393/the-office. I've also tried to download individual episodes, but it is still not working as intended.