Steps to reproduce:
1. Create new Unity project
2. Install Platform Toolkit package via Package Manager window
3. Open Play Mode Controls window (Window > Platform Toolkit > Play Mode Controls)
4. Add Play Mode Controls Settings
5. Go to Test Account Data
6. In “Test User 1” > Picture click on Pick button
7. In “Select Texture 2D” window select “None”
8. Observe the Console window

Actual results:  ”[UI Toolkit] Could not set value for target of type 'List`1' at path '[0].Picture': could not convert from 'null (Object)' to 'Texture2D'. (PlayModeControlsWindow)
UnityEditor.RetainedMode:UpdateSchedulers () (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/RetainedMode.cs:43)” warning is thrown in the Console window
Expected results: No warnings are thrown in the Console window, “None (Texture 2D)” should be set in Object selection field

Reproducible with versions: 1.0.0 (6000.3.11f1, 6000.4.0b11, 6000.5.0a8
Can’t test with versions: 6000.0.70f1 (Package is not supported)

Tested on (OS): macOS Silicon Tahoe 26.3 (M1)