first upload all files

Themes/Storefront/resources/lang/en/404.php

@@ -0,0 +1,8 @@
+<?php
+
+return [
+    '404' => '404',
+    'page_not_found' => 'Oops! Page Not Found.',
+    'unable_to_find_the_page' => 'Sorry but we are unable to find the page that you are looking for.',
+    'back_to_home' => 'BACK TO HOME',
+];