[PLASMA 5] Most effects are not supported by the Compositor

[Guest]

Hi!
I'm new with KDE and Plasma 5 particulary, so I'd thank a bit of help.
Most of the desktop effects are hidden and I have to click on "Exclude Desktop Effects not supported by the Compositor" to show them. These effects which appear don't work. Why is it? I previously installed KaOS and they worked, so I don't understand what am I doing wrong with this installation.
Thanks!

[Rog131]

A bit more information is needed...

A bit more information is needed. You could get the KWin support information by executing:

qdbus org.kde.KWin /KWin supportInformation

in the terminal/konsole.

The output provides information about the currently running instance, which options are used,
what OpenGL driver and which effects are running.