If these steps do not clear the error, you may have a corrupt installation. In this case, disable your antivirus temporarily, re-download the installer from your Lumion Account, and perform a clean reinstall. How do you resolve start-up problems? - Knowledge Base
If you are specifically using Lumion 10.0 through 10.3.2 on a modern Windows 10 or 11 build, there is a known conflict with the onnxruntime.dll library. completely via Task Manager if necessary. If these steps do not clear the error,
To prevent the "channel not found" error from returning after the next scan, you must tell your antivirus to ignore the Lumion directory. disable your antivirus temporarily
