diff --git a/NEG/UI/UnityUi/Area/MonoArea.cs b/NEG/UI/UnityUi/Area/MonoArea.cs
index f9e09da..96d9c77 100644
--- a/NEG/UI/UnityUi/Area/MonoArea.cs
+++ b/NEG/UI/UnityUi/Area/MonoArea.cs
@@ -29,6 +29,8 @@ namespace NEG.UI.Area
 
         private void OnDestroy()
         {
+            if(UiManager.Instance == null)
+                return;
             if (ReferenceEquals(UiManager.Instance.CurrentArea, this))
                 UiManager.Instance.CurrentArea = null;
         }
diff --git a/NEG/UI/UnityUi/Window/MonoWindow.cs b/NEG/UI/UnityUi/Window/MonoWindow.cs
index 7597334..6d9639e 100644
--- a/NEG/UI/UnityUi/Window/MonoWindow.cs
+++ b/NEG/UI/UnityUi/Window/MonoWindow.cs
@@ -27,7 +27,10 @@ namespace NEG.UI.UnityUi.Window
 
         private void OnDestroy()
         {
-            if (IsOpened) UiManager.Instance.OnWindowClosed(this);
+            if(UiManager.Instance == null)
+                return;
+            if (IsOpened) 
+                UiManager.Instance.OnWindowClosed(this);
         }
 
         private void OnValidate()