To reproduce:
1. Create a new project
2. Go into player settings and open Script Execution Order window
3. Leave the window Open and build and Run to platform

Actual result: ArgumentException: GUILayout: Mismatched LayoutGroup.repaint error appears in console and the build is canceled
Expected result: The build should finish without errors.

Reproduced with:2018.3.0a4; 2018.3.14f1;2018.4.5f1; 2019.1.12f1;2019.2.0b10; 2019.3.0a10
No repro: 2017.4.30f1 2018.2.21f1; 2018.3.0a3

Note: The errors appear only when the new window of project settings was introduced

Errors:
GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

ArgumentException: GUILayout: Mismatched LayoutGroup.repaint

MissingReferenceException: The object of type 'MonoScript' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.

GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)