Error reading HTML template file

System.ArgumentException: Invalid path for MapPath ''. A virtual path is expected. at System.Web.HttpRequest.MapPath(String virtualPath, String baseVirtualDir, Boolean allowCrossAppMapping) at System.Web.HttpServerUtility.MapPath(String path) at ChurchCMS.ContentPump.ScaleImage(Image img, Int32 maxWidth, Int32 maxHeight) at ChurchCMS.ContentPump.LoadDeliveryTemplate(Control spot, Int32 DomainID, Int32 MinistryID)