Lumion Is Being Prevented From Contacting The License [top] ❲Latest - 2025❳

Before you start, make sure you have administrative access to your computer. You’ll need it to change firewall settings.

Most of the time, deleting the "Lumion" lines in your or adjusting your Firewall will solve the issue instantly. If you’ve tried all the above and still can't get in, it may be a temporary outage on the Act-3D servers, or your office network might have a hardware firewall (like a SonicWall) that requires your IT manager to manually whitelist Lumion's license domains. lumion is being prevented from contacting the license

If you use third-party security software, you must add Lumion to the "Exceptions" or "Whitelist" list within that software's settings. Consult your antivirus documentation on how to "Whitelist an application." Before you start, make sure you have administrative

This is a network communication issue. The software cannot verify that you have a valid license because the "handshake" between your PC and the Lumion servers is being interrupted. If you’ve tried all the above and still