Network error while activating the license. Check that this server can reach xfileultra.com
Install wizard shows installWizard.errors.licenseNetworkError when the activate call cannot reach the license API.
Why this happens
DNS/firewall/proxy blocking outbound HTTPS, or temporary network outage. Distinct from Could not activate the license key (API rejected the key).
Diagnose and fix
1. From the server: test HTTPS to xfileultra.com.
2. Open required outbound ports; fix proxy settings.
3. Retry activation.
4. See First-run install wizard / What the license key does.