Can't set color on action

Steps:
1) Start studio with some presentation
2) Create Action with Target Object "Scene" and Handler "Set Property" and Property "Background Color".
3) Try to change color with the selector

-> Doesn't work, this error appears into console:

qrc:/Palettes/Action/HandlerGenericBaseColor.qml:71: ReferenceError: _inspectorModel is not defined

Same seems to happen with any property which changes color.