PayPal encrypted website payments error

Hi. Installed Woocommerce and trying to place order in my website. When I click on the checkout button I get an error saying ‘The seller accepts encrypted website payments only. You cannot pay the seller through un-encrypted buttons. Please contact your seller for more details’

Payments need to be encrypted via PayPal for security reasons. I am not exactly sure what I need to do in the settings to make online orders go smoothly with PayPal.

How can you help please?

Beatriz

https://wordpress.org/plugins/woocommerce/