It is not working. What we do:
1) Create a new folder wp-content/mu-plugins
2) Have uploaded a file (functions.php) with code:
<?php
function custom_easymail_add_categories ( $args ) {
$args['taxonomies'] = array( 'category' );
return $args;
}
add_filter ( 'alo_easymail_register_newsletter_args', 'custom_easymail_add_categories' );
?>
3) Make a new newsletter
4) Filter from mailinglist name Admin (id=11)
5) On the page newsletter we input the shortcode
[ALO-EASYMAIL-ARCHIVE category=11]
6) We send the newsletter to the users (me)
7) We see not on the page. We have 2 newsletters on this filter.
Link page on website
What can we do?