diff --git a/site/plugins/admin/templates/extends/plugins/index.html b/site/plugins/admin/templates/extends/plugins/index.html
index b4384042..14f3fdef 100644
--- a/site/plugins/admin/templates/extends/plugins/index.html
+++ b/site/plugins/admin/templates/extends/plugins/index.html
@@ -94,7 +94,9 @@
 {% block tail %}
     <script>
         function deactivatePlugin(id, row_num) {
-            dropdown[row_num].hide();
+            if (dropdown[row_num]) {
+                dropdown[row_num].hide();
+            }
             Swal.fire(
                 {title: "{{ tr('admin_confirmation_required') }}", text: "{{ tr('admin_confirmation_required_for_deactivate_system_plugin') }}", showCancelButton: true, confirmButtonText: "{{ tr('admin_yes_iam_sure')|raw }}", cancelButtonText: "{{ tr('admin_cancel') }}"}
             ).then((result) => {