“ArgumentOutOfRangeException” error thrown in the Console and is Inspector broken when exiting Debug mode on an UI Element created in Hierarchy

Unity: UI Toolkit Authoring Framework

Fixed

6.6.X

6000.6.0b1

Steps to reproduce:
1. Create new Unity project using Universal 3D Template
2. In Hierarchy create Visual Element object (Right-click > UI Toolkit > Standard Elements > Visual Element)
3. In “Open UI stage” pop-up press “Continue” and save UXML file
4. In Inspector window press on kebab (⋮) button while Visual Element is selected and select “Debug”
5. Press “Exit Debug” button
6. Observe the Console window

Actual results: “ArgumentOutOfRangeException: Specified argument was out of the range of valid values.” Error is thrown in the Console window when exiting Debug mode in the Inspector window. The Inspector window becomes broken, the selected Visual Element can no longer be edited

Expected results: No errors are thrown in the Console window, UI Element editing is fully functional in Inspector window after exiting Debug mode

Reproducible with versions: 6000.6.0a7

Can’t test with versions: 6000.6.0a6 and lower (No such feature to create UI Elements in Hierarchy window)

Tested on (OS): macOS Tahoe 26.4.1

ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Unity.UIToolkit.Editor.VisualElementInspector.SetEditFlags (Unity.UIToolkit.Editor.VisualElementEditFlags editFlags) (at /Users/bokken/build/output/unity/unity/Modules/UIToolkitAuthoringEditor/Managed/Hierarchy/Selection/Editor/VisualElementInspector.cs:189)
Unity.UIToolkit.Editor.VisualElementInspector.set_EditFlags (Unity.UIToolkit.Editor.VisualElementEditFlags value) (at /Users/bokken/build/output/unity/unity/Modules/UIToolkitAuthoringEditor/Managed/Hierarchy/Selection/Editor/VisualElementInspector.cs:99)
Unity.UIToolkit.Editor.VisualElementSelectionEditor.ApplyState () (at /Users/bokken/build/output/unity/unity/Modules/UIToolkitAuthoringEditor/Managed/Hierarchy/Selection/Editor/VisualElementSelectionEditor.cs:98)
Unity.UIToolkit.Editor.VisualElementSelectionEditor.CreateInspectorGUI () (at /Users/bokken/build/output/unity/unity/Modules/UIToolkitAuthoringEditor/Managed/Hierarchy/Selection/Editor/VisualElementSelectionEditor.cs:125)
UnityEditor.UIElements.InspectorElement.CreateInspectorElementUsingUIToolkit (UnityEditor.Editor targetEditor) (at /Users/bokken/build/output/unity/unity/Editor/Mono/UIElements/Inspector/InspectorElement.cs:697)

“ArgumentOutOfRangeException” error thrown in the Console and is Inspector broken when exiting Debug mode on an UI Element created in Hierarchy

Unity: UI Toolkit Authoring Framework

Fixed

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“ArgumentOutOfRangeException” error thrown in the Console and is Inspector broken when exiting Debug mode on an UI Element created in Hierarchy

Unity: UI Toolkit Authoring Framework

Statuses

Fixed

Resolution Notes

Description

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Have a workaround or additional info about this issue?