“InvalidOperationException" and "ArgumentException" errors are thrown in the Console when generating a 3D object using AI Assistant window

Steps to reproduce:
1. Create new Unity project using Universal 3D Project
2. Open Project Settings window and dock it next to Game tab
3. In the Unity toolbar, click the “AI” button
4. Click “Agree and install Unity AI” and install AI Package
5. Open AI Assistant window
6. Give a prompt to generate a 3D Object (e.g “Create 3D F1 car model”)
7. Observe the Console while model is being generated 

Actual results: Errors are thrown in the Console window while 3D object is being generated “InvalidOperationException” and “ArgumentException”

Expected results: No errors are thrown in the Console while Assistant is generating a 3D object

Reproducible with versions: 2.7.0-pre.2 (6000.3.14f1, 6000.4.7f1, 6000.5.0b7, 6000.6.0a4)

Can’t test with versions: 6000.6.0a5 (due to [Internal link]), 6000.0.75f1 (AI Assistant package is not available)

Tested on (OS): Windows 11, macOS Tahoe 26.4.1