Lumion 12 Is Being Prevented From Contacting The License Server

Try these solutions in order. Test Lumion after each step.

Troubleshooting: Lumion 12 Connection to License Server Seeing the error message 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 . Try these solutions in order

Before diving into complex settings, perform these three rapid checks. Try these solutions in order

As of late 2025, Lumion has upgraded its backend authentication system. If you are using Lumion 12 or older, your license be tied to a Lumion Account . Try these solutions in order