I discovered setup would not run if only python 3 was installed on the server. Maybe helpful with future distros?
Prerequisites
Configuring your DNS server
Getting this playbook’s source code
Configuring the playbook
Installing
Registering users
Configuring service discovery via .well-known
Maintenance / checking if services work
Maintenance / upgrading services
Maintenance / PostgreSQL
Maintenance and Troubleshooting
Uninstalling