can't download my playlist

[yyyywaiwai]

run gamdl https://music.apple.com/jp/playlist/%E5%85%A5%E9%96%80/pl.u-Ymb0vVPUgbqG8VW
I got an error:

[WARNING  11:41:32] mp4decrypt not found at "mp4decrypt", music videos videos will not be downloaded
[ERROR    11:41:33] (URL 1/1) Failed to check "https://music.apple.com/jp/playlist/%E5%85%A5%E9%96%80/pl.u-Ymb0vVPUgbqG8VW"
[INFO     11:41:33] Done (1 error(s))

Album, song, and official playlist(made from apple) are works fine.

[Rafael Moraes]

Should be fixed on the new release.