Cannot view demo

I was going to buy this plugin, but I went back to your page https://employee-directory.emdplugins.com/organization-chart/ and now I cannot show my client your demo. I was able to see the org chart a few days ago, and scroll up/down, etc. but now it’s not showing up. How can I see / show the demo?
Thanks, Ted

The page I need help with: [log in to see the link]