Your network firewall may be actively blocking outbound or inbound data traffic for Lumion 12. You must create an explicit rule to allow it.
This will help us narrow down if it's a or a network restriction . Your network firewall may be actively blocking outbound
Corrupted network routing data or outdated DNS caches can prevent your computer from finding the correct path to the Lumion server. Corrupted network routing data or outdated DNS caches
Turn off your antivirus shields for 10 minutes and try launching Lumion. If it works, your antivirus is the culprit. Scroll down to and click Add or remove exclusions
Scroll down to and click Add or remove exclusions . Select Add an exclusion > Folder .
Search for in your Start menu, right-click it, and select Run as Administrator . Open the file at: C:\Windows\System32\drivers\etc\hosts . Look for any lines containing the word "lumion" . Delete those lines , save the file, and restart Lumion. 4. Verify Administrative Rights
Occasionally, your computer saves an old path to the Lumion server (DNS cache) that is no longer correct. Flushing the DNS cache forces your computer to find the correct server address again.