KDE 'cube'

[turborat]

5.15.12-1-siduction-amd64  KDE

Haven't used KDE in years, so I thought I'd have a look at it  today. After putzing around with it for a while, I discovered I can no longer activate the 'cube'. Can someone please tell me how to enable it, or has it been discontinued?

[samoht]

Look at
https://forum.siduction.org/index.php?topic=8433.msg67762#msg67762

Discussion in
https://bugs.kde.org/show_bug.cgi?id=443410#c37