Steps to reproduce:
1. Create new Unity project
2. Open Build Profiles window
3. In Build Profiles window press “Add Build Profiles”
4. Add macOS Build Profile
5. Once added, press “Add Settings”
6. Add “Player Settings”
7. Expand “Player Settings”
8. Scroll down and find “Scripting Define Symbols”
9. Press “+”
10. Do not apply changes
11. Scroll up to find and press onkebab button next to “Player Settings”
12. Select “Reset”
13. In “Reset Settings” pop-up press “Reset”
14. In “Scripting Define Symbols Have Been Modified” press “Apply”
15. Observe the Console window 

Actual results: after Reset > Apply > “NullReferenceException” error is thrown in the Console
Expected results: No errors are thrown, reset and apply complete without any issues, Scriptig Define Symbols revert correctly

Reproducible with versions: 6000.3.0b6, 6000.4.0a2
Can’t test with versions: 6000.2.8f1 and lower (kebab menu item doesn’t have “Reset”)

Tested on (OS): macOS Silicon, Tahoe 26.0 (M1)