QML Module Not Found(import error)

Hi, does anyone know the answer that problem?

import QGroundControl 1.0
import QGroundControl.Controls 1.0
import QGroundControl.Palette 1.0
import QGroundControl.MultiVehicleManager 1.0
import QGroundControl.ScreenTools 1.0
import QGroundControl.Controllers 1.0

When I run the code, I get a “QML module not found” message next to these lines.