[NSFW] Browser cache problem (according to wordpress)

Hello, In WordPress I get a warning about the browser cache, In English it says something like “No page cache detected but the server response time is good”. The configuration seems correct from the plugin

Is it just a visual problem or do I really have a bigger problem?

https://i.ibb.co/YBkbmh0/Captura-desde-2022-11-16-12-16-59.png
https://i.ibb.co/72Zk4Nd/Captura-desde-2022-11-16-12-17-17.png

Thank you

The page I need help with: [log in to see the link]

 

This site will teach you how to build a WordPress website for beginners. We will cover everything from installing WordPress to adding pages, posts, and images to your site. You will learn how to customize your site with themes and plugins, as well as how to market your site online.

Buy WordPress Transfer