If you work for a firm with a strict IT department, you will likely not be able to fix this yourself. The error is occurring because your company’s is intercepting SSL traffic (a "Man-in-the-Middle" for security scans).
If the technical fixes above do not work, the issue may be on the account side. If you work for a firm with a
Some software allows connecting through different license servers. Check if Lumion provides alternative servers or ports that can be used. Which of these troubleshooting steps If you have
Troubleshoot issues that often follow license errors. Which of these troubleshooting steps " which often causes blockages.
If you have tried all seven steps and the error persists, the final resort is a clean reinstallation of Lumion 12 with all antivirus software temporarily disabled during installation. Back up your Documents\Lumion 12\Library folder first.
that contain the word "lumion," which often causes blockages. Account-License Synchronization : Checks if the License Key is correctly registered to a Lumion Account
Before altering your computer settings, verify if the issue is on Lumion’s end. Like all cloud-based licensing systems, Lumion’s servers undergo occasional maintenance or face temporary outages.

