Post filtered by tags

Hi,

What should I do to display posts filtered by tags?. I updated the version blog and has stopped working.

Code in my page

<?php $opts = array(
'sort'=>'postDateTime',
'sort-order'=>'DESC',
'count'=>'4',
'category'=>array('news'),
'tag'=>'featured',
'template'=>'blog/home_list.html'
 );
perch_blog_custom($opts); ?>

Diagnostic report

Perch: 2.8.26, PHP: 5.4.45, MySQL: 5.5.42-37.1, with PDO
Server OS: Linux, cgi-fcgi
Installed apps: content (2.8.26), assets (2.8.26), categories (2.8.26), perch_blog (5.0), perch_events (1.9.2), perch_forms (1.8.3), perch_gallery (2.8.6), perch_newsfeed (1), perch_comments (1.0), perch_members (1.0.2), perch_backup (1.2)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_blog', 'perch_events', 'perch_forms', 'perch_gallery', 'perch_comments', 'perch_members', );
PERCH_LOGINPATH: /manejador
PERCH_PATH: /home/biotery/public_html/manejador
PERCH_CORE: /home/biotery/public_html/manejador/core
PERCH_RESFILEPATH: /home/biotery/public_html/manejador/resources
Image manipulation: GD Imagick
PHP limits: Max upload 64M, Max POST 64M, Memory: 256M, Total max file upload: 64M
F1: 2edba60ed1f613d6dd804feb202456a2
Resource folder writeable: Yes
DOCUMENT_ROOT: /home/biotery/public_html
HTTP_HOST: www.biotery.com
REQUEST_URI: /manejador/core/settings/diagnostics/
SCRIPT_NAME: /manejador/core/settings/diagnostics/index.php