Hi,
as we need more than 40 lists, I tried to increase this by adding a PHP code snippet (as advised in the documentation):
define('NEWSLETTER_LIST_MAX', 99);
then deactivated and re-activated the plugin for the site (within a multi-site installation).
I have access to the database and checked that the wp_newsletter table now has columns for lists 41-99, so that part has worked.
However, the lists UI still only shows four tabs for lists 1-40, so I can’t add any lists.
Any idea what might be the problem?
Thanks