You need to turn draft mode back on. That flow includes steps that have not yet been built out. Those steps are built out in the UI and Reporting lessons. Disabling draft mode forces Pega to validate the rules referenced by the flow.
I got the link to your exercise env. The actual results you are seeing are what I would expect to see based on the config of the Onboarding case type in your env.
The good news is, the Facilities Setup assignment is being generated (as shown in image actual_resutls.png. It is getting assigned to the System Architect (the uer you are logged in as) because the office location is not specified, so the routing table defaults to the the SA user if none of the conditions (office locations) are found.
A few minor glitches in the config, but it is working.