: Save the file (ensure it does not have a .txt extension) and restart Lumion 2023. Additional Troubleshooting for Connection Failures

The error message in Lumion 2023 typically indicates that the software's attempts to connect to its official licensing servers are being blocked by your computer's network configuration. This often occurs because the Windows "hosts" file contains manual overrides—sometimes added by security software or older patches—that prevent Lumion from verifying its license. Understanding the "Host File" Issue

Troubleshooting Lumion 2023: Resolving "Host File Entries Detected" Errors