Go to your Lumion installation folder: C:\Program Files\Lumion 10.x\3rd . Locate the file named onnxruntime.dll .
To prevent the "channel not found" error from returning after the next scan, you must tell your antivirus to ignore the Lumion directory.
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.