How to reproduce:
1. Create and open a new project
2. Import any FBX file with embedded textures
3. Click on the imported FBX
4. In the Inspector, select the “Material“ tab and click “Extract Textures“
5. Select any path to extract the textures to, and continue
6. Observe the Console

Expected result: Nothing is logged
Actual result: A NullReferenceException error is logged

Reproducible in: 2022.2.0a6, 2022.3.61f1, 6000.0.46f1, 6000.1.0b14, 6000.2.0a8
Not reproducible in: 2022.2.0a5

Reproduced on: Windows 11 Pro (24H2), macOS 15.3.2 (by reporter)
Not reproduced on: No other environment tested

Notes:
- The textures seem to get extracted correctly
- Part of the error reads: “NullReferenceException: SerializedObject of SerializedProperty has been Disposed.“