tranquilized - 2021-09-08

Hello. I have noticed the same warning too. In that file mod_fj_related_plus.php on line 20
I replaced
if (!count($list)) {
with
if(empty($list)){

I am not sure if this is correct but the warning disappeared. It seems to be new behavior of PHP 7.2 . But this is not an error, just a warning, and this module is not loaded in the admin panel so your problem is caused by something else.