NullReferenceException: Object reference not set to an instance of an object
UnityEditor.PrefabUtility.RegisterNewObjects (System.Collections.Generic.List`1[T] newHierarchy, System.Collections.Generic.List`1[T] hierarchy, System.String actionName) (at C:/buildslave/unity/build/Editor/Mono/ImportSettings/PrefabUtility.cs:113)
UnityEditor.PrefabUtility.ReplacePrefabWithUndo (UnityEngine.GameObject target) (at C:/buildslave/unity/build/Editor/Mono/ImportSettings/PrefabUtility.cs:217)
UnityEditor.GameObjectInspector.DoPrefabButtons (UnityEditor.PrefabType prefabType, UnityEngine.GameObject go) (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:347)
UnityEditor.GameObjectInspector.DrawInspector () (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:260)
UnityEditor.GameObjectInspector.OnHeaderGUI () (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:170)
UnityEditor.Editor.DrawHeader () (at C:/buildslave/unity/build/Editor/Mono/Inspector/Editor.cs:420)
UnityEditor.InspectorWindow.DrawEditor (UnityEditor.Editor[] editors, System.Int32 editorIndex, System.Boolean rebuildOptimizedGUIBlock, System.Boolean& showImportedObjectBarNext, UnityEngine.Rect& importedObjectBarRect) (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1125)
UnityEditor.InspectorWindow.DrawEditors (UnityEditor.Editor[] editors) (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1030)
UnityEditor.InspectorWindow.OnGUI () (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:361)
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <cfc149f8218b496788d8493c87de777a>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <cfc149f8218b496788d8493c87de777a>:0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at <cfc149f8218b496788d8493c87de777a>:0)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:295)
UnityEditor.HostView.Invoke (System.String methodName) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:288)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:261)
UnityEditor.DockArea.OldOnGUI () (at C:/buildslave/unity/build/Editor/Mono/GUI/DockArea.cs:400)
UnityEngine.Experimental.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:199)
UnityEngine.Experimental.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:339)
UnityEngine.Experimental.UIElements.IMGUIContainer.HandleEvent (UnityEngine.Experimental.UIElements.EventBase evt) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:318)
UnityEngine.Experimental.UIElements.EventDispatcher.DispatchEvent (UnityEngine.Experimental.UIElements.EventBase evt, UnityEngine.Experimental.UIElements.IPanel panel) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/EventDispatcher.cs:250)
UnityEngine.Experimental.UIElements.UIElementsUtility.DoDispatch (UnityEngine.Experimental.UIElements.BaseVisualElementPanel panel) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/UIElementsUtility.cs:256)
UnityEngine.Experimental.UIElements.UIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/UIElementsUtility.cs:78)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at C:/buildslave/unity/build/Runtime/IMGUI/Managed/GUIUtility.cs:175)
UnityEditor.PrefabUtility.RegisterNewObjects (System.Collections.Generic.List`1[T] newHierarchy, System.Collections.Generic.List`1[T] hierarchy, System.String actionName) (at C:/buildslave/unity/build/Editor/Mono/ImportSettings/PrefabUtility.cs:113)
UnityEditor.PrefabUtility.ReplacePrefabWithUndo (UnityEngine.GameObject target) (at C:/buildslave/unity/build/Editor/Mono/ImportSettings/PrefabUtility.cs:217)
UnityEditor.GameObjectInspector.DoPrefabButtons (UnityEditor.PrefabType prefabType, UnityEngine.GameObject go) (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:347)
UnityEditor.GameObjectInspector.DrawInspector () (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:260)
UnityEditor.GameObjectInspector.OnHeaderGUI () (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:170)
UnityEditor.Editor.DrawHeader () (at C:/buildslave/unity/build/Editor/Mono/Inspector/Editor.cs:420)
UnityEditor.InspectorWindow.DrawEditor (UnityEditor.Editor[] editors, System.Int32 editorIndex, System.Boolean rebuildOptimizedGUIBlock, System.Boolean& showImportedObjectBarNext, UnityEngine.Rect& importedObjectBarRect) (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1125)
UnityEditor.InspectorWindow.DrawEditors (UnityEditor.Editor[] editors) (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1030)
UnityEditor.InspectorWindow.OnGUI () (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:361)
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <cfc149f8218b496788d8493c87de777a>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <cfc149f8218b496788d8493c87de777a>:0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at <cfc149f8218b496788d8493c87de777a>:0)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:295)
UnityEditor.HostView.Invoke (System.String methodName) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:288)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:261)
UnityEditor.DockArea.OldOnGUI () (at C:/buildslave/unity/build/Editor/Mono/GUI/DockArea.cs:400)
UnityEngine.Experimental.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:199)
UnityEngine.Experimental.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:339)
UnityEngine.Experimental.UIElements.IMGUIContainer.HandleEvent (UnityEngine.Experimental.UIElements.EventBase evt) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:318)
UnityEngine.Experimental.UIElements.EventDispatcher.DispatchEvent (UnityEngine.Experimental.UIElements.EventBase evt, UnityEngine.Experimental.UIElements.IPanel panel) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/EventDispatcher.cs:250)
UnityEngine.Experimental.UIElements.UIElementsUtility.DoDispatch (UnityEngine.Experimental.UIElements.BaseVisualElementPanel panel) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/UIElementsUtility.cs:256)
UnityEngine.Experimental.UIElements.UIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at C:/buildslave/unity/build/Runtime/UIElements/Managed/UIElementsUtility.cs:78)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at C:/buildslave/unity/build/Runtime/IMGUI/Managed/GUIUtility.cs:175)
