Fix array

system/library/acpsystem.php

@@ -451,7 +451,7 @@
 
             fclose($stack);
 
-            return isset($subnetwork{0}) ? $subnetwork : 'не определена';
+            return isset($subnetwork[0]) ? $subnetwork : 'не определена';
         }
 
         public static function uptime_load($time)