diff --git a/resources/js/admin/product.js b/resources/js/admin/product.js
index fe9ff4a..f8ecbe4 100644
--- a/resources/js/admin/product.js
+++ b/resources/js/admin/product.js
@@ -119,7 +119,10 @@ window.ProductAdmin=function (options,ProductItem) {
                 {
                     "targets": 1,
                     "render": function ( data, type, row ) {
-                        return type === "sort" ? data.latinise() : data;
+                        if (type === "sort") {
+                            return (data && typeof data === 'string') ? data.latinise() : (data ?? '');
+                        }
+                        return data;
                     },
                 },
                 //{ "visible": false,  "targets": [ 0 ] }
@@ -473,7 +476,10 @@ window.ProductAdmin=function (options,ProductItem) {
                         {
                             "targets": 1,
                             "render": function ( data, type, row ) {
-                                return type === "sort" ? data.latinise() : data;
+                                if (type === "sort") {
+                                    return (data && typeof data === 'string') ? data.latinise() : (data ?? '');
+                                }
+                                return data;
                             },
                         },
                         //{ "visible": false,  "targets": [ 0 ] }