It sounds like you're encountering the error message:

Lack of proper permissions can also skip load routines. Right-click the Lumion.exe or its shortcut and select Run as administrator Summary of Causes Potential Cause Antivirus Interference Files in the folder are quarantined by mistake. Windows Update Conflict Microsoft's version of onnxruntime.dll conflicting with Lumion's. Insufficient Permissions

  1. Locate your original Lumion installer .exe or .cab files.
  2. Right-click the installer > 7-Zip > "Open Archive."
  3. Look for a folder named Channels or Files\Channels.
  4. Inside, you will see files named like channel_01.cgr, channel_02.cgr, reflection_channel.lpk.
  5. Extract all channel files into your broken Lumion installation folder under .\Channels\.
  6. If the folder doesn't exist, create it manually: C:\Program Files\Lumion\Channels\.
  7. Restart Lumion.

This guide will walk you through the most effective ways to resolve this issue so you can get back to your 3D rendering. 1. Disable Antivirus and Windows Defender