An error occurred while attaching module (Dynamicweb.Frontend.Content)

System.ArgumentException: Illegal characters in path.
   at System.IO.Path.CheckInvalidPathChars(String path, Boolean checkAdditional)
   at System.IO.Path.Combine(String path1, String path2)
   at Dynamicweb.Core.SystemInformation.MapPath(String relativePath)
   at Dynamicweb.SystemTools.Gui.GetMediaFullPath(String pathToMedia)
   at Dynamicweb.SystemTools.Gui.MakeMedia(String& pathToMedia, String& link, String target, String& mouseover, String& caption, Boolean& putInTable, String& settings, String& placement, String forceImageWidth, String forceImageHeight, Boolean addFilesToUrl)
   at Dynamicweb.Ecommerce.Frontend.Renderer.MakeMedia(String path, String className)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderDetail(Detail detail, Template template)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderDetails(IEnumerable`1 details, Template parentTemplate, String loopName)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderProduct(Product product, Boolean extendedProperties, Template template, Int32 loopCounter, Boolean renderRelated, String productUrl, Int32 quantity, Int32 wishListId, Boolean renderPublicList, Boolean isRecursiveCall, Lazy`1 categoryFieldSorting, Int32 orderLineOfProductCount, RenderingContext renderingContext, String unitId)
   at Dynamicweb.Ecommerce.Frontend.Renderer.RenderProduct(Product product, Boolean extendedProperties, String unitId)
   at Dynamicweb.Ecommerce.Frontend.Frontend.EcomRender()
   at Dynamicweb.Ecommerce.Frontend.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModuleOutput(Paragraph paragraph, PageView pageview)