Steps to reproduce:
- open tests/manual/qml/testfiles_quick2/testfiles_quick2.qmlproject
- open one of the qml files and switch over to the Designer view
- hit the button for the Live Preview
- you'll get a message box with
- QmlScene comes up and displays the current qml file (correctly)
Note: I'm using Qt5.11.x for the current kit. The same problem also happens when using a Qt Quick application from template.