ArgumentNullException: Value cannot be null. Parameter name: objectToUndo

[Watcher3056]

Error appears on first stage(creating copy) of the wizard, stopping from setup.
Unity 2021.3.13f1

ArgumentNullException: Value cannot be null.
Parameter name: objectToUndo
UnityEditor.Undo.DestroyObjectImmediate (UnityEngine.Object objectToUndo) (at <dc1a47a5816e4be7bc6817ee4d339e75>:0)
Hairibar.Ragdoll.Animation.Editor.AnimatedRagdollWizard+RigDuplicationWizard.RemoveAllComponents (UnityEngine.GameObject copy) (at Library/PackageCache/com.hairibar.ragdoll@5773bfb6c6/Animation/Editor/AnimatedRagdollWizard.cs:168)
Hairibar.Ragdoll.Animation.Editor.AnimatedRagdollWizard+RigDuplicationWizard.OnWizardCreate () (at Library/PackageCache/com.hairibar.ragdoll@5773bfb6c6/Animation/Editor/AnimatedRagdollWizard.cs:108)
System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <c9d3ffd4b98649ee9989e1908eaca019>: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 <c9d3ffd4b98649ee9989e1908eaca019>:0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at <c9d3ffd4b98649ee9989e1908eaca019>:0)
UnityEditor.ScriptableWizard.OnGUI () (at <dc1a47a5816e4be7bc6817ee4d339e75>:0)
UnityEditor.HostView.OldOnGUI () (at <dc1a47a5816e4be7bc6817ee4d339e75>:0)
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 <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, UnityEngine.Matrix4x4 worldTransform, UnityEngine.Rect clippingRect, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, System.Boolean canAffectFocus) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.IMGUIContainer.SendEventToIMGUIRaw (UnityEngine.UIElements.EventBase evt, System.Boolean canAffectFocus, System.Boolean verifyBounds) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.IMGUIContainer.SendEventToIMGUI (UnityEngine.UIElements.EventBase evt, System.Boolean canAffectFocus, System.Boolean verifyBounds) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.IMGUIContainer.HandleEvent (UnityEngine.UIElements.EventBase evt) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEventAtTargetPhase (UnityEngine.UIElements.EventBase evt) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.MouseCaptureDispatchingStrategy.DispatchEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.EventDispatcher.ApplyDispatchingStrategies (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel, System.Boolean imguiEventIsInitiallyUsed) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEventQueue () (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.EventDispatcher.OpenGate () (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.EventDispatcherGate.Dispose () (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.EventDispatcher.Dispatch (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel, UnityEngine.UIElements.DispatchMode dispatchMode) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.BaseVisualElementPanel.SendEvent (UnityEngine.UIElements.EventBase e, UnityEngine.UIElements.DispatchMode dispatchMode) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& eventHandled) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.UIEventRegistration.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.UIElements.UIEventRegistration+<>c.<.cctor>b__1_2 (System.Int32 i, System.IntPtr ptr) (at <0b1cb8f4dac44a9698c79ef2d7b929aa>:0)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& result) (at <9e893022843f45a88085fc45ea2d3f89>:0)