Signed-off-by: TRADER_FOER <lhf190@outlook.com>

Assets/Scripts/Manager/OperationManager.cs

@@ -49,6 +49,7 @@ namespace Ichni.Editor
         {
             currentSelectedElements.ForEach(gameElement =>
             {
+                if (gameElement == null || gameElement.connectedTab == null) return;
                 gameElement.connectedTab.isSelected = false;
                 if (gameElement.connectedTab.BgImage != null)
                 {