"InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation" error is logged and Player Settings window becomes blank after changing Scripting backend and Api Compatibility Level fields

Unity: Build Settings Window

This issue has been closed as a duplicate of:

Changing editor theme causes InvalidOperationException

Won't Fix

6.2.X

6000.2.0a1 onwards

6.1.X

Steps to reproduce:
1. Create a new project
2. Change Scripting backend to IL2CPP (Edit > Project Settings... > Player)
3. Change Api Compatibility Level to the that's not selected
4. Wait for script compiling to finish loading and observe the Console and Player Settings windows

Actual results:

InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation
UnityEngine.UIElements.VisualElement+Hierarchy.Clear () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:673)
UnityEngine.UIElements.VisualElement.Clear () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:256)
UnityEditor.SettingsWindow.ProviderChanged (UnityEditor.SettingsProvider lastSelectedProvider, UnityEditor.SettingsProvider newlySelectedProvider) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:276)
UnityEditor.SettingsTreeView.SelectionChanged (System.Collections.Generic.IList`1[T] selectedIds) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsTreeView.cs:66)
UnityEditor.SettingsTreeView.FocusSelection (System.Int32 selectedId) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsTreeView.cs:46)
UnityEditor.SettingsWindow.SelectProviderByName (System.String name, System.Boolean ignoreLastSelected) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:111)
UnityEditor.SettingsWindow.RestoreSelection () (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:242)
UnityEditor.SettingsWindow.InitProviders () (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:168)
UnityEditor.SettingsWindow.DrawTreeView () (at /Users/bokken/build/output/unity/unity/Editor/Mono/Settings/SettingsWindow.cs:500)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Action onGUIHandler, System.Boolean canAffectFocus) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/IMGUIContainer.cs:403)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:219)

error is thrown and Player Settings window becomes blank
Expected results: No errors are thrown and Scripting backend and Api Compatability Level fields change to the selected ones in the Player Settings window

Reproducible with versions: 6000.2.0a1, 6000.2.0a3
Not reproducible with versions: 2021.3.48f1, 2022.3.58f1, 6000.0.38f1, 6000.1.0a10, 6000.1.0b5

Tested on (OS): macOS Sequoia 15.2 (Intel)

Notes:

If issue is not reproducing repeat step 3 a few times, sometimes it also reproduces after Scripting backend to Mono and back

Additionally "Leak Detected : Persistent allocates 2 individual allocations. To find out more please enable 'Settings > Jobs > Leak Detection Level > Enabled With Stack Trace' and reproduce the leak again." message is logged

"InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation" error is logged and Player Settings window becomes blank after changing Scripting backend and Api Compatibility Level fields

Unity: Build Settings Window

Won't Fix

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

"InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation" error is logged and Player Settings window becomes blank after changing Scripting backend and Api Compatibility Level fields

Unity: Build Settings Window

Statuses

Won't Fix

Resolution Notes

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?