fix:not init session var

@@ -72,7 +72,7 @@ class Session extends ServiceManager
 
 
         $payload = Cache::get($this->name);
         $payload = Cache::get($this->name);
 
 
-        return $payload[$key];
+        return Arr::get($payload, $key, '');
     }
     }
 
 
     public function __get($name)
     public function __get($name)