Trying to export klipper history with qdbus, but get QT error

hi, i get the message:
qdbus: could not find a Qt installation of ''

I googled it and found someone saying qt5-default install worked, but for me, it says no installation candidate.

So, how do i install QT? Doesnt every linux/kde installation come with it. I thought this is like a fundamental thing for desktop environments.