"This is Elias at Studio Arcadia. I need a port exception opened. Port 8080 and 443, specifically for the Lumion verification IP range."
This is the most common cause. Antivirus software like often overreach. They see Lumion 12 trying to access an external server and assume it’s a "phoning home" trojan. They silently block the connection without notifying you. "This is Elias at Studio Arcadia
Ensure Lumion.exe is allowed through the Windows Defender Firewall. "This is Elias at Studio Arcadia
John contacted the Lumion support team, reporting the issue and providing details about the problem. They were grateful for his thorough investigation and confirmed that the issue was indeed related to SecurityGuard. "This is Elias at Studio Arcadia