diff --git a/web/html/common/qrcode_modal.html b/web/html/common/qrcode_modal.html
index e6b7b998..57bf810d 100644
--- a/web/html/common/qrcode_modal.html
+++ b/web/html/common/qrcode_modal.html
@@ -94,7 +94,7 @@
             }
         },
         updated() {
-            if (qrModal.client.subId){
+            if (qrModal.client && qrModal.client.subId){
                 qrModal.subId = qrModal.client.subId;
                 this.setQrCode("qrCode-sub",this.genSubLink(qrModal.subId));
             }