Normally that should be sufficient, the next thing to try to debug this would be running a qml app outside of Julia. Does
qmlscene $HOME/.julia/v0.6/QML/test/qml/qquickview.qml
bring up a window briefly and then error out with “ReferenceError: hi is not defined”?
Also, to avoid cluttering the forum I have created an issue to debug this further.