Reproduction steps:
1. Extract the Project from the Link
2. Place the Packages and the Manifest into the Packages folder of the MarsLWRP Project
3. Open the Project
4. Open the Assets\00_Scenes\00_BaseScene Scene
5. Search for "Measurement UI" in the Project Browser
6. Select the "Measurement UI" Prefab and drag it into the Scene View

Expected result: The Prefab is placed in the Scene
Actual result: The Editor crashes

Reproducible with: 2021.2.0a5, 2021.2.0a17
Not reproducible with: 2021.2.0a4
Could not test with: 2019.4, 2020.3, 2021.1 (Project breaks when downgrading)

Notes:
Does not reproduce on 2020.3 or below (2021.1 unknown), but cannot be tested with this Project