Keyboard Accessible Drag & Drop Example

Hi, Terry and community, I downloaded this file and opened it in my Storyline 360 application, and when I preview it or publish it to Review 360, using the tab key on the first slide to start the presentation does not activate the accessible version of the second slide. It does not work. Which may explain why so many users are confused here. I don't know if something changed in  a recent update of Storyline (it asked me to update the file when I opened it) or if it must be published to an LMS to work correctly, but this solution is not working. Either the variable is not recognizing the keyboard activity, or the triggers are not functioning as indicated. Please help. Thank you!