TrackChanges running problem

I’m continuing with the Building AI Workers in MindStudio (1-hour course) and trying to run the trackChanges AI. However, I’m having trouble getting it to work, and since I don’t know how to code, I’m not sure what to do next.

Could someone please guide me on how to fix things correctly?

Also, I understand that the AI will send a notification if it works correctly—but I don’t know where to look for that notification. Could you please show me?

Thanks so much in advance!