У вашего броузера проблема в совместимости с HTML5
SmartDraw is the perfect alternative for Visio®. Import existing Visio® files and stencils with just a few clicks and enjoy SmartDraw's power and ease of use. You'll be able to edit pages, ungroup symbols, change fill color, resize shapes and continue working on your Visio® diagram. You can also export any diagram as a Visio® file to collaborate with anyone who hasn't made the switch. Learn more about SmartDraw's Visio import and export features here: https://www.smartdraw.com/software/visio-import.htm?id=333169