没有c＃的全新场景中的错误？ （:)的NullReferenceException

Question

我刚刚（重新）安装了Unity版本2017.3.1f1，我实际上只是打开一个空白场景，没有.cs，但是当我创建空白＆＃39;时出现错误。在层次结构？

它确实在层次结构中创建了新的GameObject（以蓝色突出显示），但它无法点击，我也无法点击主摄像头或方向灯，我收到此错误：

我实际上在Unity 2017.3.0f3中测试过并得到完全相同的问题。

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.TooltipView.Close () (at C:/buildslave/unity/build/Editor/Mono/TooltipView/TooltipView.cs:98)
UnityEditor.RenameOverlay.RemoveMessage () (at C:/buildslave/unity/build/Editor/Mono/GUI/RenameOverlay.cs:335)
UnityEditor.RenameOverlay.EndRename (Boolean acceptChanges) (at C:/buildslave/unity/build/Editor/Mono/GUI/RenameOverlay.cs:111)
UnityEditor.IMGUI.Controls.TreeViewController.EndNameEditing (Boolean acceptChanges) (at C:/buildslave/unity/build/Editor/Mono/GUI/TreeView/TreeViewController.cs:811)
UnityEditor.SceneHierarchyWindow.OnLostFocus () (at C:/buildslave/unity/build/Editor/Mono/SceneHierarchyWindow.cs:409)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
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.OnLostFocus () (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:135)

截图：

非常感谢任何帮助：）