If you are using Lumion 10.0 to 10.3.2, a conflict with Windows 10 updates (version 2004) often causes this specific error:
A specific registry key can cause the "channel" system to fail.
Antivirus software is the #1 cause of the "channel not found" error. It sometimes sees Lumion’s channel decoders as "packers" used by malware. Disable Real-time protection and Folder Access Control .
If you've encountered the frustrating message you're not alone. This error typically appears during startup, preventing the software from launching properly. It usually stems from a conflict with Windows security, missing system components, or specific library clashes.