Mac Qt Creator qmlplugindump issue

[treaves]

I've just created a Qt Quick project. Standard boilerplate code. When I open the project, I get this message:

Automatic type dump of QML module failed.
Errors:
"/Users/treaves/Qt/5.6/clang_64/bin/qmlplugindump" returned exit code 3.
Arguments: -nonrelocatable Qt.labs.controls.universal 1.0 /Users/treaves/Qt/5.6/clang_64/qml
QQmlComponent: Component is not ready
file:///Users/treaves/Qt/5.6/clang_64/qml/loaddependencies.qml:6:1: module "Qt.labs.controls.universal.impl" is not installed

This is repeated a couple of times. Anyone know how to clear this up?