I am using Qt Creator 4.0.3 and when looking at an older project using QtQuick 1.1 and trying to view in the designer, I get "Cannot open this QML document because of an error in QML file: Unsupported QtQuick version (0:0).
"Go to error" brings me to the line import QtQuick 1.1 in my .qml file. I do not know if QtQuick 1.1 is loaded or available nor do I know how to find that info.
I'd guess the reason ist that QtQuick 1 was removed with Qt 5.6 (at least from the release packages). Qt_5.6 Removed_Modules
Either Qt uses Qt 5.6/5.7 and/or was built with 5.6/5.7
You would need to build and use QtCreator with Qt 5.5 I guess.