Hi,
The PayPal button is not showing on checkout page.
Error: https://www.rag-shop.com/checkout/undefined net::ERR_ABORTED 404
at https://www.rag-shop.com/wp-content/plugins/woocommerce-paypal-payments/modules/ppcp-button/assets/js/button.js
Turning on developer mode solves the problem.
BR
Can you try creating a Page Rule to bypass cache on the checkout page?