View file panel/inc/settings.php

<?
mysql_query("INSERT INTO `sidebar_settings` SET `id_user` = '$user[id]', `data` = '[]'");
$sidebar_settings = mysql_fetch_assoc(mysql_query("SELECT * FROM `sidebar_settings` WHERE `id_user` = '$user[id]'"));
$sidebar_settings_cache = json_decode($sidebar_settings['data'], true);
$sidebar_enabled = isset($user) && $webbrowser;
?>