If you are using a VPN or a Proxy, try disabling it, as these often interfere with the background "handshake" between the software and the server. 2. Update Your Hosts File
%localappdata%\Lumion\Licenses
The "Invalid License" error usually means Lumion thinks your current computer doesn't match the hardware signature stored on the License Server, or your local license cache is corrupted. lumion invalid license fix
To resolve invalid license errors in Lumion, follow these steps: If you are using a VPN or a
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Sometimes, previous installations or network tweaks can add entries to your Windows "hosts" file that block Lumion’s connection to its home server. Open as an Administrator.
The "Your license is invalid" message in Lumion (versions 12.5 and earlier, or 2023 and newer) typically occurs when software on your PC prevents the application from communicating with Lumion's activation servers. Primary Troubleshooting Steps