Module fails in the BO

[luprix 1]

Hello.

I have migrated my PS from V 1.7.5.2, PHP 5.6.4 to a new server with PS 1.7.6.8, PHP 7.2.14

Now a module fails when trying to show itself in the BO Customer Form, indicating the error:
An exception has been thrown during the rendering of a template ("Unable to load template 'file:helpers/uploader\simple.tpl'").

In the module.php:

public function install()
{
	...
	$this->registerHook('displayAdminCustomers') &&
	...


public function hookDisplayAdminCustomers($params)
{
	...
	return $this->renderFormCustomer($params['id_customer']);
	...


public function renderFormCustomer($id_customer = false)
{
	...
	return $helper->generateForm(array($fields_form));
	...

Not use template (tpl)

I have done many tests without result.

Any help please?

 

[luprix 1]

I have reinstalled the previous Prestashop on the new server and the module works correctly.

The failure is not caused by the change of version of PHP, but of Prestashop.