diff --git a/models/Product.php b/models/Product.php
index 4383020..40da816 100755
--- a/models/Product.php
+++ b/models/Product.php
@@ -405,7 +405,7 @@
                                         )
                                         ->where(
                                             [
-                                                'tax_group_to_category.category_id' => $this->category->id,
+                                                'tax_group_to_category.category_id' => $this->category?$this->category->id:null,
                                                 'tax_group.use_in_name'             => 1,
                                                 'tax_option.id'                     => ArrayHelper::getColumn(
                                                     $this->options,
@@ -424,11 +424,12 @@
             } else {
                 $groupName = '';
             }
-            
-            if (!empty($this->category->lang->category_synonym)) {
-                $name = $name . ( $groupName ? $groupName : $this->category->lang->category_synonym ) . ' ';
-            } else {
-                $name = $name . ( $groupName ? $groupName : $this->category->lang->title ) . ' ';
+            if(!empty($this->category)) {
+                if (!empty($this->category->lang->category_synonym)) {
+                    $name = $name . ( $groupName ? $groupName : $this->category->lang->category_synonym ) . ' ';
+                } else {
+                    $name = $name . ( $groupName ? $groupName : $this->category->lang->title ) . ' ';
+                }
             }
             
             if (!empty($this->brand)) {
--
libgit2 0.21.4