NRKRadio - playlist not supported

[trikinov]

$ youtube-dl https://radio.nrk.no/serie/dickie-dick-dickens -x --audio-format mp3 --yes-playlist -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://radio.nrk.no/serie/dickie-dick-dickens', u'-x', u'--audio-format', u'mp3', u'--yes-playlist', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.07.27
[debug] Python version 2.7.3 (CPython) - Linux-3.2.0-6-amd64-x86_64-with-debian-7.11
[debug] exe versions: avconv 0.8.21-6, avprobe 0.8.21-6, ffmpeg 0.8.21-6, ffprobe 0.8.21-6, rtmpdump 2.4
[debug] Proxy map: {}
[NRKTVSeries] dickie-dick-dickens: Downloading webpage
[download] Downloading playlist: Dickie Dick Dickens - NRK Radio
[NRKTVSeries] playlist Dickie Dick Dickens - NRK Radio: Collected 0 video ids (downloading 0 of them)
[download] Finished downloading playlist: Dickie Dick Dickens - NRK Radio