PHP 7.2 warning

I’m getting a report on all web pages – “Warning: array_merge(): Argument #2 is not an array in /home/cypruspr/public_html/wp/wp-content/plugins/wp-pagenavi/scb/Options.php on line 62”

I believe this is the offender?

public function get( $field = null, $default = null ) {
$data = array_merge( $this->defaults, get_option( $this->key, array() ) );

return scbForms::get_value( $field, $data, $default );

Regards