Use the sessions get method to get rows_per_page

app/call_centers/call_center_queues.php

@@ -105,7 +105,7 @@
 	$num_rows = $database->select($sql, $parameters ?? null, 'column');
 
 //prepare to page the results
-	$rows_per_page = ($_SESSION['domain']['paging']['numeric'] != '') ? $_SESSION['domain']['paging']['numeric'] : 50;
+	$rows_per_page = $settings->get('domain', 'paging', 50);
 	$param = "&search=".urlencode($search);
 	if ($show == "all" && permission_exists('call_center_all')) {
 		$param .= "&show=all";