diff --git a/Assets/Script/SDKManager/AppSDKManager.cs b/Assets/Script/SDKManager/AppSDKManager.cs
index 9da0bdb..8910341 100644
--- a/Assets/Script/SDKManager/AppSDKManager.cs
+++ b/Assets/Script/SDKManager/AppSDKManager.cs
@@ -782,6 +782,8 @@ public class AppSDKManager : D_MonoSingleton<AppSDKManager>
         {
             return "GetSSSuperProperties";
         }
-        return ThinkingAnalyticsAPI.GetSuperProperties().ToString();
+
+        var superProperties = ThinkingAnalyticsAPI.GetSuperProperties();
+        return superProperties == null ? "" : superProperties.ToString();
     }
 }