Lumion 12 Is Being Prevented From Contacting The License Server Exclusive May 2026

Troubleshooting: "Lumion 12 is being prevented from contacting the license server"

This error typically occurs when security software or system settings block Lumion from accessing its authentication servers. To resolve this, follow these troubleshooting steps: 1. Update Your Lumion Account Add AV exception in your antivirus for:

Part 2: Immediate Checks (The Low-Hanging Fruit)

3. Domains & IPs to Whitelist