I have the latest version of AcyMailing and I have used it to create a pop-up that contains a newsletter sign-up and sends an automatic welcome email containing a promo code (using the SendiBlue integration). The problem is that the WooCommerce site I am using the extension on was already sending a thank you email using the default WooCommerce service upon a successful purchase on the site. When AcyMailing is activated, the WooCommerce purchase confirmation email is not being sent, causing a critical error. The customer pays but does not receive a confirmation email and neither do I.