array warnings

Hi, got these today in the debug.log:

PHP Warning:  array_merge(): Argument #3 is not an array in /wp-content/plugins/pareto-security/pareto_functions.php on line 696
PHP Warning:  array_unique() expects parameter 1 to be array, null given in /wp-content/plugins/pareto-security/pareto_functions.php on line 697
PHP Warning:  count(): Parameter must be an array or an object that implements Countable in /wp-content/plugins/pareto-security/pareto_functions.php on line 698

WP and PS fully updated, on Linux/PHP7.2.

Thanks.