Generated error after notification

Hi,

I need help with generated error in error_log file on my server:

PHP Warning: count(): Parameter must be an array or an object that implements Countable in /home/****/public_html/wp-content/plugins/email-posts-to-subscribers/query/dbquery-notification.php on line 285

That’s happened every time when email notification is triggered via cron job.

Thank you in advance.