This is the most common fix. Windows Defender is excellent, but it can be overzealous.
If you have tried all these steps and the error persists, you should contact directly via their website. Be sure to include a link to your Lumion Diagnostics file in your support ticket, as this helps their technical team see exactly where the blockage is happening. lumion is being prevented from contacting the license
If you are seeing the error message it means the Lumion software on your computer is trying to communicate with the Lumion license servers, but something is blocking that connection. This is the most common fix
"I am receiving a licensing error for Lumion. The software is being blocked from contacting the license servers. Can you please ensure the following domains are whitelisted on the network firewall?" Be sure to include a link to your
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