I upgraded a project from 2017.1 to 2018.3.a6. The project loads fine but I'm unable to click any game object in the hierarchy. If I try to move the Unity Window it will turn completely red. If I close and reopen the project it continues to display red and i'm unable to work.

Steps to reproduce
- Unzip the attached project and open with Unity 2018.3.0a6.
- When project has loaded try to click on any game object in the hierarchy.
Notice issue >> nothing is selectable..

- Resize the Window, from the bottom left hand corner.
Notice issue >> windows turns RED.

Tested: OSX
Broken: 2018.3.0a6
Working: 2018.3.0a5, 2018.2.0f2 (Scene needs to be rebuilt)