Error : Warning: count()

Hi,

When I send an email, I have the following errors :

Warning: count(): Parameter must be an array or an object that implements Countable in /web/wp-content/plugins/wp-email-users/wp-email-functions.php on line 40

Warning: count(): Parameter must be an array or an object that implements Countable in /web/wp-content/plugins/wp-email-users/wp-email-functions.php on line 40

Warning: count(): Parameter must be an array or an object that implements Countable in /web/wp-content/plugins/wp-email-users/wp-send-mail.php on line 1006

Warning: count(): Parameter must be an array or an object that implements Countable in /web/wp-content/plugins/wp-email-users/wp-email-functions.php on line 11

I guess this is related to PHP 7.2 ?

Thank you !