qt quick designer

Hei guys,, i want to report something about qt quick designer(qt creator).

i install qt5.11.1 community version with gcc and android's support in linux mint operating system.
i create new project (desktop project) and tried to import qtcharts module(first) but after i import that module. i got warning "qtchart module not installed" and qtchart widget not shown, but i tried to code manually with qtchart module, then i running my program , its works fine..
i dont know why it has happen... or maybe i must buy a commercial version??
its not just qtchart module but another module didnt placed in

/Qt/Tools/QtCreator/lib/Qt/qml/
i dont know its bug or just me didnt know to configure qt quick design, but if i saw properties in qt creator it refer to right path, gcc in Qt/5.11.1/gcc or arm in Qt/5.11.1/arm

sorry for my bad english