Failed to publish

I am attempting to build a preview sample of a nine-module program.  Each of the nine have been successfully published and are available as a course in Rise.  Of course each was published by Articulate.

When I combined a few slide from each of the sections it fails to publish.  I know sending in the error report may not help but I did cut and paste the error information.

<?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">
<FirstName />
<LastName />
<EmailAddress>bobc@psenonline.com</EmailAddress>
<UserId>auth0|94d8a3e0-b37d-0131-2ee8-22000b2f96a1</UserId>
<MachineName>DESKTOP-P7NHOLN</MachineName>
<HardwareId>TVV3U-MR3H1-C697D-47P33-F9RUA</HardwareId>
<Message>The method or operation is not implemented.</Message>
<StackTrace> at Articulate.Presenter.Model.PowerPoint.ObjectModel.Group.Ungroup()
at Articulate.Presenter.Model.PowerPoint.ObjectModel.Shape.fn()
at Articulate.Presenter.Model.PowerPoint.ObjectModel.Shape.Duplicate()
at am6.g()
at av0.er()
at av0.by(IPlayerService A_0, bwVectorShape A_1, bwVectorData A_2)
at av0.b8(IPlayerService A_0, bwVectorShape A_1)
at av0.tw(IPlayerService A_0, bwSlideBase A_1)
at av0.GetStageObject(IPlayerService service, bwSlideBase slide)
at Articulate.Player.PlayerContentPublisher.a(IEnumerable`1 A_0, bwSlideBase A_1)
at Articulate.Player.PlayerContentPublisher.CreateSlideObject(IPlayerSlide slide, bwISlideContainer sceneobj)
at Articulate.Player.PlayerContentPublisher.CreateBridgewaterSlide(PlayerWriterSettings settings, IPlayerSlide slide, bwISlideContainer sceneobj)
at Articulate.Player.PlayerContentPublisher.CreateContentScenes(PlayerWriterSettings settings, IPlayerContentProvider contentProvider)
at Articulate.Player.PlayerWriter.WriteContent(IPlayerContentProvider contentProvider, Nullable`1 merged)
at Articulate.Player.PlayerWriter.Write(IPlayerContentProvider contentProvider)
at Articulate.Design.Publish.TargetContext.PublishBackgroundWorker.OnDoWork(DoWorkEventArgs e)
at Articulate.ComponentModel.STABackgroundWorker.a(Object A_0)</StackTrace>
</ErrorReport>

Any thoughts will be helpful.