Open the sample button, shows a blank page

I’ve been a long time supporter of Pinegrow. It is a great product but I’ve never used it much. I decided to upgrade for another year. I opened Pinegrow and selected the “Getting started with Pinegrow-interactive” tutorial. I selected the button “Open the sample page”. The page opened, but only using the blank page template.

Can anyone troubleshoot this problem with me?

I’m running Pinegrow on a MacBook Pro with Mojave.