So I first had issues with the checkout, there was a 500 server error thrown:
[Wed Nov 03 18:14:52.942411 2021] [php7:error] [pid 238973] [client xx] PHP Fatal error: Access level to SaferpayCw_LayoutController::$page_name must be public (as in class ModuleFrontController) in /var/www/html/mys...