Initialise $is_new to prevent warning on live site

wp-content/themes/mont58-coffee/template-order-label.php

@@ -132,6 +132,8 @@ if(!is_user_logged_in()){
       
       $j = 0;
 
+      $is_new = false;
+
       foreach ($items as $item) {
           // checking if product is a coffee
           $product_id = $item->get_product_id();