This topic has been closed for further comments. You can use the search bar to find a similar topic, or create a new one by clicking Create Topic at the top of the page.
Yep... you will need to have an Android or iOS device connected to WiFi in order to set up a new system.
The desktop controller no longer allows setting up a new system, adding a new speaker/device, or performing most of the management/admin type tasks. More info can be found in this topic:
https://en.community.sonos.com/announcements-228985/updates-to-the-desktop-controller-coming-soon-6813300