Install Qt5.15.2 gcc_64 binaries, launch Creator and open project quickcontrols/extras/flat, compile and launch.
Application launches, but the UI keeps running the spinner and has label 'Loading Light Flat UI' and doesn't open any other views.
Creator Application Output has:
QML debugging is enabled. Only use this in a safe environment.
qrc:/ExtrasImports/QtQuick/Controls/Styles/Flat/ApplicationWindowStyle.qml:106:13: Qml.Binding - Qml is neither a type nor a namespace
qml: Failed to load Style for ApplicationWindow_QMLTYPE_18_QML_70(0x564ececb7100)
file:file:file:file:file:qrc:/Content.qml:370:32: Type Flat.CircularGaugeStyle unavailable
qrc:/ExtrasImports/QtQuick/Controls/Styles/Flat/CircularGaugeStyle.qml:82:22: Duplicate method name: invalid override of property change signal or superclass signal
Same with 5.15.1.