Dear Ralph, we generally don’t provide direct support to downstream distributions. Since you seem to be using siduction I would recommend to raise the issue to them first.
Still I’d be interested in the output of : apt list kwin-common kwin-decoration-oxygen libkwin6 kwin-x11 kwin-wayland kwin-style-breeze kde-config-gtk-style which are the packages depending on libkdecorations2-6, in case I see something obvious ? Happy hacking, -- Aurélien
