There is no QWidget window((

I'm two days trying to figure out how use Qts WebWindow, but cant do that anyway... There is simply no such tool in Design->DisplayWidgets but as i saw alot of videos and tutorials all have that at the bottom of that DisplayWidgets list.

I thought that i dont have some libraries, so i downloaded everything what concerns Web in Qt, but still cant create WebWindow.

P.S. there is also no library i can include in my project like #include <QtWebKitWidgets/QWebView> there is no such thing...

P.P.S. i have QT 5.10 version, there is no such option here in your site.