"Invalid StyleProperty" errors are thrown when UI Animation is set up and any non-UI Panel Renderer Property is added to Animation window

Steps to reproduce:

1. Open the "66ETs.zip" project
2. Open the "SampleScene"
3. Select the "Anims" GameObject
4. Open the "New UI Animation" Animation Clip in Animation window
5. Add the "Panel Renderer > Enabled" property
6. Observe the Console

Actual results: An "Invalid StyleProperty!
UnityEditor.AnimationWindowBuiltin.AnimationWindowClip:CreateCurves" error is thrown

Expected results: Nothing is thrown

Reproducible with versions: 6000.6.0a5, 6000.6.0a6

Not reproducible with versions: 6000.6.0a4

Can’t test with versions: 6000.0.76f1, 6000.3.16f1, 6000.4.9f1, 6000.5.0b10 (No UI Animation)

Tested on (OS): Windows 11 Pro (25H2)

Notes:

• Only reproducible when UI Toolkit Animation is set up to be used (when a VisualElement's properties are available in the "Add Property" menu)
• Reproducible with any Panel Renderer Property