Guardduty: configuration and understanding findings lab not generating findings

I am working on this lab Guardduty: configuration and understanding findings lab, finished all the first 8 steps successfully.  For the last two steps, it was mentioned in step 8
"Note: This lab is generating findings live. If you don't immediately see the findings referenced in the questions below, wait a couple of minutes for them to generate."

I waited more than 15 minutes and the number of findings stayed at 0. I tried the lab yesterday and then this morning, same thing.