Chris wrote:
You didn't break anything - that setup screen lives in your browser, not the window you closed, so nothing was lost. Just open a browser and go back to your server's address followed by :8443, like http://192.168.1.50:8443 (whatever address you used the first time). If you can't remember the address, hop back into the same terminal you installed from and run sudo sparkbox urls - it'll print the exact link to visit, and you can pick up right where you left off on the VPN step.