I could give you Login credentials because our site is in maintenance mode. Then please tell me a possibility to send you the login securely.
The plugin is definetely the problem. If I deactivate Woocommerce Germanized the Buttons are visible.
Deactivate the options “Verlinkung zu Produktdetails” and “Zum Warenkorb Button” did not solve the problem.
Thank you for your support.