Import Activity window shows "(None)" in the Asset field when changing the path of the asset

How to reproduce:
1. Open the “IN-91452_repro“ project
2. In the Project window, right-click on the “New Material 1“ asset and press Reimport
3. Move the “New Material 1“ asset into the “New Folder“
4. Navigate to Window → Analysis → Import Activity
5. Select “New Material 1“and observe the Asset filed

Expected result: “New Material 1“ is selected in the Asset field
Actual result: ”(None)” is seen in the Asset field

Reproducible with: 2021.3.47f1, 2022.3.55f1, 6000.0.33f1, 6000.1.0a10

Reproducible on: Windows 10, macOS 14.5
Not reproducible on: No other environment tested

Notes:

• In 6000.0.33f1 and 6000.1.0a10 editor versions an error is thrown
• The error: ArgumentNullException: Value cannot be null. Parameter name: key