Media Gallery Upload Error

Many of my users are getting the following error when they upload to a media gallery.  The file appears to be posted, but we get an "Error" notification on the screen and the page doesn't redirect.  I think this is the exception that is being thrown

Telligent.Evolution.Components.CSException: Permission to view group denied.
 at Telligent.Evolution.Api.Services.GalleryService.†(Group , User Ž)
 at Telligent.Evolution.Api.Services.GalleryService.GetGallery(Nullable`1 galleryId, String key, Nullable`1 groupId)
 at Telligent.Evolution.Extensibility.Api.Version1.ReadOnlyUnrenderableMediaEventArgsBase.“„()
 at Telligent.Evolution.Extensibility.Api.Version1.ReadOnlyUnrenderableMediaEventArgsBase.get_Application()
 at Telligent.Evolution.Api.Content.Galleries.MediaFileContentType.˜(MediaRenderEventArgs Ž)
 at Telligent.Evolution.Extensibility.Api.Version1.MediaRenderEventHandler.Invoke(MediaRenderEventArgs e)
 at Telligent.Evolution.Api.Events.MediaEventExecutor.OnRender(MediaGalleryPost media, String propertyName, String propertyHtml, String target)
 at Telligent.Evolution.MediaGalleries.Components.MediaGalleryPost.RenderedBody(PostTarget target)
 at Telligent.Evolution.Api.Content.Galleries.GalleryApplicationType.Š(PageContext Ž, IPageOutputController , Boolean ƒŸ)
 at Telligent.Evolution.Urls.Routing.SiteUrlRouteHandler.GetPageHttpHandler(RequestContext requestContext, PageContext pageContext)
 at Telligent.Evolution.Urls.Routing.SiteUrlRouteHandler.GetHttpHandler(RequestContext requestContext)
 at System.Web.Routing.UrlRoutingModule.PostResolveRequestCache(HttpContextBase context)
 at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
 at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

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