Resolve:
The issue is that the "test" button should not be pressed until the "Employees" assign is corrected. This is a detail they do not include in the guide. The Employees assign will still want a "GetEmployees.List" which no longer exists because you deleted it in the first step. The guide does not tell you to go to the assign and change the value under "Employees" to "SQL1.List".
Not a major issue, but for someone new to OutSystems, maybe bullet-proof a little more.