Fehler bei Kuka .step datei import

Ich erhalte folgenden Fehler beim importieren von einer Kuka Step Datei in Realvirtual.io.

Unity Version: 2022.3.25f

UnityException: Transform child out of bounds
realvirtual.CADLink.CompleteCADData (UnityEngine.GameObject resultgo) (at Assets/realvirtual/CADLink/private/CADLink.cs:388)
realvirtual.CADLink.ImportCad () (at Assets/realvirtual/CADLink/private/CADLink.cs:238)
System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at :0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at :0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at :0)
NaughtyAttributes.Editor.NaughtyEditorGUI.Button (UnityEngine.Object target, System.Reflection.MethodInfo methodInfo) (at Assets/realvirtual/private/Tools/NaughtyAttributes/Editor/Utility/NaughtyEditorGUI.cs:167)
NaughtyAttributes.Editor.NaughtyInspector.DrawButtons (System.Boolean drawHeader) (at Assets/realvirtual/private/Tools/NaughtyAttributes/Editor/NaughtyInspector.cs:188)
NaughtyAttributes.Editor.NaughtyInspector.OnInspectorGUI () (at Assets/realvirtual/private/Tools/NaughtyAttributes/Editor/NaughtyInspector.cs:52)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass72_0.b__0 () (at /Users/bokken/build/output/unity/unity/Editor/Mono/UIElements/Inspector/InspectorElement.cs:713)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:203)