Cannot open this QML document because of an error in the QML file

I create the empty application QtQuick on Deepin 20.8.

I do not add anything and switch to Design mode for qml file.

The error message:

"Cannot open this QML document because of an error in the QML file.

Line: 2: Errors while reading typeinfo files:

Failed to parse "/usr/lib/x86 64-linux-gnu/qt5/gml/QtQuick/Window.2/

plugins.gmltypes".

Error: /usr/lib/x86 64-linux-gnu/gt5/gml/QtQuick/Window.2/plugins.gmltypes

96:21: Expected object literal after colon.

/usr/lib/x86 64-linux-gnu/qt5/qml/QtQuick/Window.2/plugins.qmltypes:106:21：

Expected object literal after colon.

/usr/lib/x86 64-linux-gnu/qt5/gml/QtQuick/Window.2/plugins.qmltypes:110:21:

Expected object literal after colon.

/usr/lib/x86 64-linux-gnu/qt5/qml/QtQuick/Window.2/plugins.qmltypes:114:21:

Expected object literal after colon

/usr/lib/x86 64-linux-gnu/qt5/qml/QtQuick/Window.2/plugins.gmltypes:227:21:

Expected object literal after colon.

/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Window.2/plugins.qmltypes:238:21：

Expected object literal after colon