The module is Improve Data Quality for a Cleaning supply App, the step is Create a Validation Rule. I get the typical unexpected error while verifying. I created a new playground, got the same error. I opened the developer console to look at the log created when clicking the verify button and no log shows up. I opened an old trusty playground and without completing the step I just clicked the button, same error ( I would have expected a this field doesn't exist error) and no log created. 

It's almost like the verify step button is broke.