"Invalid value for image texture Keyword" warnings are thrown in the Console when Grid Layout is enabled and a Button Element is created

Steps to reproduce:
1. Create a new Unity project using Universal 3D Template
2. Open Project Settings window > UI Toolkit
3. Enable Grid Layout
4. In Hierarchy, create Button Element
5. Save New UXML file
6. Observe the Console window 

Actual results: “Invalid value for image texture Keyword” warnings are thrown in the Console window

Expected results: No warnings are thrown in the Console window

Reproducible with versions: 6000.7.0b2, 7000.0.0a1

Can’t test with versions: 6000.6.2f1 and lower (feature not available)

Tested on (OS): macOS 27 (Apple silicon)

Invalid value for image texture Keyword
UnityEditor.GUIView:ProcessEvent (UnityEngine.EntityId,intptr,bool&) (at /Users/bokken/build/output/unity/unity/Editor/Mono/GUIView.cs:89)