mollie webhook werkt niet

$payment = $mollie->payments->create([
		  "amount" => [
				"currency" => "EUR",
				"value" => "".array_sum($total).".00" // You must send the correct number of decimals, thus we enforce the use of strings
		  ],
		  "description" => "Premium rapport",
		  "redirectUrl" => "".HTML_ROOT."betaald",
		  "webhookUrl" => "".HTML_ROOT."inc/webhook.php",
		  "metadata" => [
				"order_id" => "12345",
		  ],
	]);

include('../config.php');
include(DOC_ROOT.'class/class.php');
$DBD = new DBD();
                if (isset($_POST['id']))
				{
					require_once (DOC_ROOT.'mollie/vendor/autoload.php');
					require_once (DOC_ROOT.'mollie/examples/functions.php');
					$mollie = new \Mollie\Api\MollieApiClient();
					$mollie->setApiKey("test_xxxxxxxxxxxxxxxxxxxxxxxxxxxx");
	
		
				$payment = $mollie->payments->get($_POST['id']);					
				echo $payment ;
				mysqli_query($DBD->conn(),"INSERT into orders (status) values ('".$_POST['id']."')  ");	
				
				}