https://forum.qt.io/topic/12991/qdeclarativepropertycache-qquickitem-has-fastproperty-class-info-but-has-not-installed-property-accessors
QDeclarativePropertyCache: QQuickItem has FastProperty class info, but has not installed property...
Mar 12, 2013 - In trying out the 3d tutorials I got the following error: QDeclarativePropertyCache: QQuickItem has FastProperty class info, but has not installed property a...
class infoinstalledproperty