I’m not referring to a button issue with this quick checkout, but simply clicking it will redirect you to PayPal without the need to fill in a shipping address, automatically confirming that the shipping address matches your card address.
In general, the Card/Checkout pages come from WooCommerce, and our theme cannot influence it so please check how it works with the default Storefront theme to understand if it is our theme issue or not.
The checkout page of my system is displaying normally, but when I click on checkout in the theme shown in Figure 1 above, the credit card form disappears. Therefore, it is a problem with the theme. You can log in to my account and help me operate it. I just need to start the theme checkout page and it will display successfully.
Please, confirm the permission for plugins deactivation, and switching to the parent/default theme. As soon as we complete the testing we will enable it all back.
The issue with Express Checkout. I have correctly configured the quick checkout, but it still does not display. It should be a problem with the theme, as I switched back to the default theme and the checkout page displayed normally.