error - please can somebody help

<?xml version="1.0" encoding="utf-16"?>
<ErrorReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<UserId>aid|fb2d6b73-48af-48a8-873c-c89f921b893b</UserId>
<HardwareId>TV9UU-NCURW-VMJL7-9RP13-FWH1A</HardwareId>
<Message>Object reference not set to an instance of an object.</Message>
<StackTrace> at bwObjectData Articulate.Design.Shapes.VectorGraphic.bg(bwStageObject A_0, IPlayerService A_1, IShapeStateInfo A_2)
at bwObjectData Articulate.Design.Shapes.VectorGraphic.bg(IPlayerService A_0, bwStageObject A_1, bwSlideBase A_2)
at bwStageObject Articulate.Design.Shapes.VectorGraphic.GetStageObject(IPlayerService service, bwSlideBase slide)
at bwStageObject Articulate.Design.Shape.Articulate.Player.IPlayerShape.GetStageObject(IPlayerService service, bwSlideBase slide)
at void Articulate.Player.PlayerContentPublisher.a(IEnumerable&lt;IPlayerShape&gt; A_0, bwSlideBase A_1)
at void Articulate.Player.PlayerContentPublisher.a(IPlayerSlide A_0, bwSlide A_1)
at bwSlide Articulate.Player.PlayerContentPublisher.CreateSlideObject(IPlayerSlide slide, bwISlideContainer sceneobj)
at void Articulate.Player.PlayerContentPublisher.CreateBridgewaterSlide(PlayerWriterSettings settings, IPlayerSlide slide, bwISlideContainer sceneobj)
at bool Articulate.Player.PlayerContentPublisher.CreateContentScenes(PlayerWriterSettings settings, IPlayerContentProvider contentProvider)
at bwContent Articulate.Player.PlayerWriter.WriteContent(IPlayerContentProvider contentProvider)
at bool Articulate.Player.PlayerWriter.Write(IPlayerContentProvider contentProvider)
at void qu.p()
at void Articulate.Design.Publish.TargetContext+PublishBackgroundWorker.OnDoWork(DoWorkEventArgs e)
at void Articulate.ComponentModel.STABackgroundWorker.a(object A_0)</StackTrace>
</ErrorReport>