Reproduction steps:
1. Open the attached “ProBuilderError.zip” project
2. Open the “Sample Scene”
3. Select the “Cube” GameObject from the Hierarchy
4. In the Scene view tools change Active context to ProBuilder (Click the very top widget with an orange grid and a pencil)
5. Select the “Cut Tool”
6. Add a few cut points and connect the path
7. Observe the Console

Expected result: No errors
Actual result: “NullReferenceException: Object reference not set to an instance of an object” error

Reproducible with: 5.0.7 (2022.1.0b1), 5.2.3 (2021.3.47f1, 2022.3.56f1), 6.0.4 (6000.0.35f1, 6000.1.0b2)

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Notes:
- Might need to repeat the 6th step a few times for the issue to appear
- Pressing CTRL+Z after the error, causes even more errors and exceptions to be thrown, like “GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.” and “IndexOutOfRangeException: Index was outside the bounds of the array.”. After that, the ProBuilder context appears to be non-interactable and gets stuck spamming errors, therefore project needs to be reopened