发生错误

本地环境：

• Mac版本：11.2.2
• Unity版本：2019.2.0f1

导致报错的操作：

工程为Android平台，想修改游戏图标，点击了 Project Setting --> Player --> Default Icon

然后Player也没就不见了，并且点击报错，如下图：

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报错信息

报错截图

详细信息

Scope was not disposed! You should use the ‘using’ keyword or manually call Dispose.
UnityEngine.Scope:Finalize()

GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

ArgumentException: GUILayout: Mismatched LayoutGroup.repaint
UnityEngine.UIElements.UIR.RenderChain.Render (UnityEngine.Rect topRect, UnityEngine.Matrix4x4 projection) (at /Users/unity/buildslave/unity/build/Modules/UIElements/Renderer/UIRChainBuilder.cs:238)
UnityEngine.UIElements.UIRRepaintUpdater.DrawChain (UnityEngine.Rect topRect, UnityEngine.Matrix4x4 projection) (at /Users/unity/buildslave/unity/build/Modules/UIElements/Renderer/UIRRepaintUpdater.cs:66)
UnityEngine.UIElements.UIRRepaintUpdater.Update () (at /Users/unity/buildslave/unity/build/Modules/UIElements/Renderer/UIRRepaintUpdater.cs:54)
UnityEngine.UIElements.VisualTreeUpdater.UpdateVisualTree () (at /Users/unity/buildslave/unity/build/Modules/UIElements/VisualTreeUpdater.cs:72)
UnityEngine.UIElements.Panel.Repaint (UnityEngine.Event e) (at /Users/unity/buildslave/unity/build/Modules/UIElements/Panel.cs:637)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at /Users/unity/buildslave/unity/build/Modules/UIElements/UIElementsUtility.cs:240)
UnityEngine.UIElements.UIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at /Users/unity/buildslave/unity/build/Modules/UIElements/UIElementsUtility.cs:78)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at /Users/unity/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:179)

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解决方案

方法一：

切换平台：先切换到PC，在切换回来。然后编辑器就正常了。

实现方法：找到Build Settings面板 --> 选择PC --> 点击Switch Platform 然后等待切换完成，再切换回来。

方法二：

打安卓包：打包APK或者导出Android工程后，编辑器就正常了。

实现方法：找到Build Settings面板 --> 点击Export 或者 Build。 然后等待打包完成即可。

编辑器正常后：禁用 Metal Editor Support 会更改编辑器 API（重新启动 Editor），然后重新启用 Metal 支持（再次重新启动 Editor）和错误消失了。

其他方法

若你尝试了上述方法，那么可以看下面链接里的回答，尝试其他解决办法：
参考地址