Sometimes your security software identifies the license check as suspicious activity and kills the connection.
Look for any lines containing lumion or backup.lumiontech.net . those lines entirely. Save the file and restart Lumion. 🛡️ Step 2: Configure Windows Firewall
Troubleshoot issues that often follow license errors. Which of these troubleshooting steps
Log in to your Lumion Account on their official website to ensure your seat is active.
Open your Firewall settings and ensure Lumion.exe is allowed for both Inbound and Outbound rules.
Open Command Prompt as Admin and type ipconfig /flushdns , then hit Enter. This clears old connection data.
If you use Norton, McAfee, or Bitdefender, you must manually add the Lumion installation folder to the "White List" or "Exclusions" list.