#2976522 by Stefdewa: The onNotify function does not take into account that the payment was removed

    /** @var \Drupal\commerce_payment\Entity\Payment $payment */

    $payment = $payment_storage->loadByRemoteId($mollie_payment_remote_id);

    // The payment must be in the 'authorization' state.

    if ($payment->getState()->value !== 'authorization') {

    // Only proceed if payment exist and is in the 'authorization' state.

    if ($payment === NULL || $payment->getState()->value !== 'authorization') {

      return new JsonResponse();

    }