How to reproduce:
1. Create a new project in your preferred workspace and open it
2. Connect it to Perforce and submit the initial project
3. Install the URP package and create a new render pipeline asset
4. Either revert the packages manifest.json file or simply uninstall the URP package
5. Try to inspect the leftover render pipeline assets
6. Observe the console

Expected result: No errors are thrown in the console
Actual result: "ArgumentNullException: Value cannot be null." errors are continuously spammed while trying to inspect the asset

Reproduced in: 2020.1.0a9
Not reproducible in: 2020.1.0a8, 2020.1.0a1, 2019.3.0b8, 2019.2.10f1, 2018.4.12f1

Note: does not reproduce when version control is disabled