Navigate to the 3rd folder inside your Lumion installation directory (e.g., C:\Program Files\Lumion 10.x\3rd ). Locate the file named onnxruntime.dll .
Once you resolve the "Channel not found" error, you will want to ensure it never returns.
Standard user accounts lacking write access to program folders.
Right-clicked the Lumion shortcut and selected to ensure it had all the permissions it needed.
: Updates like the Windows 10 May 2020 Release (v2004) can cause Lumion to fail because the OS and the software both try to load different versions of the same library simultaneously.