module "QtQuick" is not installed

bronstein87

I'm trying to integrate my qml+three.js application with qwidget application.
I included qml.qrc from qml project , added into qwidget app .pro file next:

QT += qml quick
QT += quickwidgets

Then i did next:

ui->quickWidget->setSource(QUrl(QStringLiteral("qrc:/main.qml")));

but qml did not load and there are these errors:

qrc:/main.qml:1 module "QtQuick" is not installed
qrc:/main.qml:2 module "QtCanvas3D" is not installed
qrc:/main.qml:3 module "QtQuick.Window" is not installed
qrc:/main.qml:4 module "QtQuick.Controls" is not installed
qrc:/main.qml:1 module "QtQuick" is not installed
qrc:/main.qml:2 module "QtCanvas3D" is not installed
qrc:/main.qml:3 module "QtQuick.Window" is not installed
qrc:/main.qml:4 module "QtQuick.Controls" is not installed
qrc:/main.qml:1 module "QtQuick" is not installed
qrc:/main.qml:2 module "QtCanvas3D" is not installed
qrc:/main.qml:3 module "QtQuick.Window" is not installed
qrc:/main.qml:4 module "QtQuick.Controls" is not installed
qrc:/main.qml:1 module "QtQuick" is not installed
qrc:/main.qml:2 module "QtCanvas3D" is not installed
qrc:/main.qml:3 module "QtQuick.Window" is not installed
qrc:/main.qml:4 module "QtQuick.Controls" is not installed

What i did wrong?

OS: win7
Qt version : 5.7

UPD: it works in debug mode, but don't work in release. why?