[Theme] fix persist pages

site/404.html

@@ -6,7 +6,7 @@
   <link rel="stylesheet" href="/styles/style.css">
   <link rel="stylesheet" href="/styles/404.css">
   <link rel="shortcut icon" href="/img/favicon.ico" type="image/x-icon">
-  <script src="/scripts/main.js" defer></script>
+  <script src="/scripts/main.js"></script>
   <title>404</title>
 </head>
 <body>