License Server - Lumion 12 Is Being Prevented From Contacting The

Troubleshooting: Lumion 12 Connection to License Server Seeing the error message "Lumion 12 is being prevented from contacting the license server" can bring your project to a grinding halt. This usually happens because your computer’s security settings or network configuration are blocking Lumion's communication with the Lumion authorization servers.

The Solution

Your firewall might be blocking the specific ports Lumion uses to verify your license.

Version Mismatch: Ensure you are actually running Lumion 12. If you recently upgraded to a newer version, the 12.0 license may have been deactivated.