Prestashop 1.5-1.7 Why do some orders not appear in Prestashop? How to manage Prestashop order ID? How to perform a refund from Prestashop Back Office? How do I add the Systempay payment method logo to PrestaShop 1.7? How do I edit the logo of the Systempay payment method? Why does Prestashop display that the module is not verified during installation? Why is the payment method not clickable by the buyer? How can I change the order in which the payment methods are displayed to the buyer? Why does not Systempay appear among the payment methods? How do I customize the payment method title that is displayed to the buyer? Why do some orders appear with a few cent difference? What does error 22 - CUST_COUNTRY mean? How do I manage delivery to Corsica and overseas France? How do I configure the module in multi-shop mode? Why are there some invalid fields in the billing address? How do I display 500 type errors in Prestashop?