keep getting this error message in on hands on trailhead practice- however, I have completed the task- "Challenge Not yet complete... here's what's wrong:  Could not find a notification on the dashboard. Please check the requirements again."

I am unable to complete the hands-on challenge "Create a lens that shows which industry is buying the most laptops" I continue to receive the following error even after multiple attempts.

"Challenge Not yet complete... here's what's wrong: 
The 'Top Laptop Industry' lens does not appear to have the correct query. Please check the requirements and ensure everything is setup correctly."

Completed the challenge.  Added the notification (see attached image) in the Wave developer org.  It looks like it did not save the first time.  Added the notification a 2nd time, as shown in screen capture.