Prestashop 1.7 , sending email in proaccount module - prestashop

Question

We are using proaccount , this module allow users to register as professionnal. This module send and email to staff when an you customer is register. I tried to edit the code but nothing happen , send mail method is not the same in prestashop doc
{
$context = Context::getContext();
$id_lang = (int)$context->language->id;
$iso = Language::getIsoById($id_lang);
$id_shop = (int)$context->shop->id;
$address_text = '';
if ((int)Configuration::get('PROACCOUNT_REGISTER_WITH_ADDRESS')
&& (int)Configuration::get('PROACCOUNT_REGISTER_ADDRESS_PRO')) {
$addresses = $customer->getAddresses($id_lang);
$address = new Address($addresses[0]['id_address']);
$address_text = AddressFormat::generateAddress($address);
}
if (file_exists(dirname(__FILE__).'/mails/'.$iso.'/pro_account.txt')
&& file_exists(dirname(__FILE__).'/mails/'.$iso.'/pro_account.html')) {
$file_attachment = !empty($this->file_attachment['name']) ?
$this->file_attachment : null;
Mail::Send(
$id_lang,
'pro_account',
$this->l('Professional account register'),
array(
'{firstname}' => $customer->firstname,
'{lastname}' => $customer->lastname,
'{email}' => $customer->email,
'{company}' => $customer->company,
'{siret}' => $customer->siret,
'{address}' => $address_text,
),
Configuration::get('PS_SHOP_EMAIL'),
null,
(string)Configuration::get('PS_SHOP_EMAIL'),
(string)Configuration::get('PS_SHOP_NAME'),
$file_attachment,
null,
dirname(__FILE__).'/mails/',
null,
(int)$id_shop
);
}
}```
Any help please ?