Steps to reproduce:

1. Create a project
2. Install Unity AI (2.3.0-pre.2)
3. Go to "Window -> Analysis -> Rendering Debugger"
4. Expand the "Lighting Features" drop-down in the "Frequently Used" window
5. Instead of "Nothing" select "Everything"
6. Update Unity theme (Unity -> Settings -> General -> Editor Theme)
7. Open Console window

Actual results: Console window displays 4 errors:
{code:java}
Lifecycle ERROR : Cannot exit scope of type 'TScope', no active scope of that type found
UnityEngine.DomainReloadLifecycleController/ScriptingCoreDebugForIl2AndMonoCpp:LogError (string) {code}
{code:java}
Lifecycle ERROR : Cannot exit scope of type 'TScope', no active scope of that type found UnityEngine.DomainReloadLifecycleController/ScriptingCoreDebugForIl2AndMonoCpp:LogError (string)
{code}
{code:java}
Lifecycle ERROR : Failed to exit assembly loaded scope, due to exception System.NullReferenceException: Object reference not set to an instance of an object
  at Unity.Scripting.LifecycleManagement.LifecycleController.ExitScope[TContext] (Unity.Scripting.LifecycleManagement.LifecycleScopeWithContext`1[T] scope) [0x00014] in /Users/bokken/build/output/unity/unity/External/ScriptingCore/Unity.Scripting/LifecycleManagement/LifecycleController.cs:301  {code}
{code:java}
NullReferenceException: Object reference not set to an instance of an object
Unity.Scripting.LifecycleManagement.LifecycleController.ExitScope[TContext] (Unity.Scripting.LifecycleManagement.LifecycleScopeWithContext`1[T] scope) (at /Users/bokken/build/output/unity/unity/External/ScriptingCore/Unity.Scripting/LifecycleManagement/LifecycleController.cs:301) {code}
Expected results: No errors

Reproducible with versions: 6000.5.0a9{},{} 6000.6.0a1

Not reproducible with versions: 6000.4.1f1, 6000.5.0a8

Can’t test with versions: 6000.5.0a1 - 6000.5.0a7, as AI can not be installed. A screenshot has been added to the Attachments section.

Tested on (OS): macOS - Tahoe 26.3.1

Notes: Errors become visible during the first Unity theme change. Sometimes several changes are needed. On the 6000.5.0a8 build, I am getting a different set of errors. A screenshot has been added to the Attachments section.