just updated to latest version but still getting black screen. hope terminal output below helps with troubleshooting.

$ /opt/qmltube/bin/qmltube
file:///opt/qmltube/qml/qmltube/main.qml:423:5: Unable to create type PageStack
PageStack {
^
file:///opt/qmltube/qml/qmltube/PageStack.qml:69:9: Unable to create type HomePage
HomePage {
^
file:///opt/qmltube/qml/qmltube/HomePage.qml:117:9: Unable to create type NavButton
NavButton {
^
file:///opt/qmltube/qml/qmltube/components/NavButton.qml:9:31: Invalid alias reference. An alias reference must be specified as <id> or <id>.<property>
property alias labelSize: label.font.pixelSize
^