PrestaShop payment window does not open, how to fix it?

Question

Prestashop

Good evening!
There is an online store on prestashop, it has a Gopay payment module (the Czech equivalent of Yandex, paypal), when choosing a payment and confirmation, the site reloads and the main page of the site opens.
The module was purchased on the official prestashop market, another payment module works, and a popup (window) opens, what is the problem, and how to solve it?

Answer 1

You need to communicate with the technical support of the module, this is the fastest and most reliable method of solving the problem.