Dear,
I just changed as follow:
$this->context->controller->addJS(__PS_BASE_URI__ . 'modules/'.$this->name.'/assets/admin/js/jquery.cookie.js');
$this->context->controller->addJquery();
=>
$this->context->controller->addJquery();
$this->context->controller->addJS(__PS_BASE_URI__ . 'modules/'.$this->name.'/assets/admin/js/jquery.cookie.js');
Thanks !
