How to reproduce:
1. Create a new Unity project
2. Import the Input System package
3. Import the Quick Search package
4. Open Edit > Project Settings > Input System Package
5. Create settings asset
6. Add a new Supported Device(e.g. Mouse)

Expected result: no errors are thrown
Actual result: NullReferenceException errors are thrown

Reproducible with: 2019.1.0a10, 2019.1.14f1, 2019.2.0a2, 2019.2.8f1, 2019.3.0b6, 2020.1.0a8
Not reproducible with: 2018.4.11f1
Could not test with: 2017.4.33f1, 2019.1.0a9, 2019.2.0a1(Packages unavailable/Input System package incompatible)

Reproducible with Input System versions: 0.1.2, 1.0.0

Reproducible with Quick Search versions: 1.1.0, 1.4.1
Not reproducible with: Quick Search versions: 1.0.9