search results only for blog entries

I'm trying to have a search that returns results only from the perchBlog app.

I'm running runway, blog app installed and have multiple blogs setup.

I know from the documentation this should be possible by adding to the 'perch_content_search() array'

perch_content_search(perch_get('q'),array(
            'count' => 2,
            'apps' => array('perchBlog'),
            'template' => 'search-result-faqs.html',
        ));

Currently I'm getting zero results from this when I search using a string that I know is included in a post.

Any help appreciated.

Summary report

Perch Runway: 3.0.11, PHP: 5.6.36, MySQL: mysqlnd 5.0.11-dev - 20120503 - $Id: 76b08b24596e12d4553bd41fc93cccd5bac2fe7a $, with PDO
Server OS: Linux, fpm-fcgi
Installed apps: content (3.0.11), assets (3.0.11), categories (3.0.11), perch_blog (5.6.1), perch_forms (1.11), perch_backup (1.2)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_forms', 'perch_blog', );
PERCH_LOGINPATH: /perch
PERCH_PATH: /volume1/web/xxx/perch
PERCH_CORE: /volume1/web/xxx/perch/core
PERCH_RESFILEPATH: /volume1/web/xxx/perch/resources
Image manipulation: GD
PHP limits: Max upload 32M, Max POST 32M, Memory: 128M, Total max file upload: 32M
F1: 3b606135b33e6a102526838f4152a807
Resource folder writeable: Yes
HTTP_HOST: xxx.site
DOCUMENT_ROOT: /volume1/web/xxx
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php