Actionscript error when previewing quizmaker free form

I've created a freeform question in quizmaker in Studio 13 and when I go to preview the quiz I get this error:

An Actionscript error has occured:

ReferenceError: Error #1065: Variable flash.display::GraphicsPathCommand is not defined.

at com.articulate.bw.v3_0.objects.vector::bwFont/CreateGlyphData()

at com.articulate.bw.v3_0.objects.vector::bwFont/DrawGlyph()

at com.articulate.bw.v3_0.objects.vector::bwVectorFactory/DrawVectorText()

at com.articulate.bw.v3_0.objects.vector::bwVectorFactory/Redraw()

at com.articulate.bw.v3_0.objects::bwText/DrawVectorText()

at com.articulate.bw.v3_0.objects::bwText/UpdateTextState()

at com.articulate.bw.v3_0.objects::bwText/ParseXMLData()

at com.articulate.bw.v3_0.objects::bwSmoothWndButton/ParseXMLData()

at com.articulate.bw.v3_0.objects::bwStageObject()

at com.articulate.bw.v3_0.objects::bwText()

at com.articulate.bw.v3_0.objects::bwSmoothWndButton()

at com.articulate.bw.v3_0.core::bwSlide/CreateObject()

at com.articulate.bw.v3_0.core::bwSlide/CreateObjects()

at com.articulate.bw.v3_0.core::bwSlide/InitSlideObjects()

at com.articulate.bw.v3_0.preloading::bwAssetLoader/QueueNextSlide()

at com.articulate.bw.v3_0.preloading::bwAssetLoader/SlideReady()

at flash.events::EventDispatcher/dispatchEventFunction()

at flash.events::EventDispatcher/dispatchEvent()

at com.articulate.bw.v3_0.core::bwSlide/AppendXMLChildren()

at com.articulate.bw.v3_0.core::bwSlide/HandleLoadComplete()

at flash.events::EventDispatcher/dispatchEventFunction()

at flash.events::EventDispatcher/dispatchEvent()

at flash.net::URLLoader/onComplete()

What's the problem?