Power Query stuck after clicke group by

[Miron]

I am going over tutorial from Microsoft website "Combine Data from multiple data sources".
The issue is that on Step 6 "Group rows by ProductID and Year". In that step, I chose two columns and clicked on "Group By" and then got transparent windows and Excel stuck. This happened two times and cannot passed that step.
I am using Windows 10, build 1903 and Office 365 Pro Plus.

 

[Miron]

Update: Did a repair of office install, seems it fixed the issue.