This message typically appears when you try to sign in, validate your license, or start a rendering session. The good news? It rarely means your license is invalid. Instead, it means your computer or network is blocking the conversation between Lumion and its verification servers.
There is nothing quite as frustrating as sitting down ready to render, only to be greeted by an error message. For Lumion users, one of the most common yet solvable headaches is the dreaded notification: "Lumion is being prevented from contacting the license server." lumion is being prevented from contacting the license
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