Hi All

I am trying to complete the Superbadge for the Lightning Experience Reports and Dashboards Specialist.  Hopefully someone is familiar with this challenge.  One of the tasks is to create a report showing Accounts without SolarBot Opportunities.  I have used the Account object to develop this report.  

I have attached a pdf that show the task requirements, the report set up and the error message I am getting.  Can anyone give me advice on where I may be going wrong?  Much appreciated