How to reproduce:
1. Download and open user's attached project "ShitGame.zip"
2. Play the scene "Level0"
3. Complete the level by reaching the doorway. (You can also do that just by dragging the player object to the end of the level's doorway object. "Attached picture")
-- watch the crash occur

Reproducible with: 2018.2.16f1, 2018.3.0b9, 2019.1.0a8
Couldn't reproduce due to errors in: 2018.1.9f2

First three lines of the stack trace:
0x0000000140BE4054 (Unity) GetComponentsImplementationRecurse<0,0,2>
0x0000000140BE40D4 (Unity) GetComponentsImplementationRecurse<0,0,2>
0x0000000140BE4C05 (Unity) GetComponentsOfTypeFromGameObject<0,0>

Note: The lines which cause the problem seem to be is in "GameController" script L32~35