[Bug][S300][bug-view-486][webui] fix manual search net error handling in no service mode

Change-Id: I760aeb9b101d692dbfa51edd52f8a49d8b58937a
diff --git a/lynq/S300/ap/app/zte_webui/js/net.js b/lynq/S300/ap/app/zte_webui/js/net.js
index 32b29ed..92b5c90 100755
--- a/lynq/S300/ap/app/zte_webui/js/net.js
+++ b/lynq/S300/ap/app/zte_webui/js/net.js
@@ -2233,6 +2233,7 @@
                         }

                     }

                 } else {

+                    errorOverlay();

                     target.networkList([]);

                 }

             });