Leverage browser caching Problem

Hi, just want to make better performance my website.

I went on tools.pingdom.com to see my performance level and I see that my website is extremely poor for the Leverage browser caching.

This problem also occurs with others test tools such as PageSpeed Insights Google Developers.

This is the complete error message: The following cacheable resources have a short freshness lifetime. Specify an expiration at least one week in the future for the following resources… (a lot of pictures of my site…)

I tried to solve the problem with WP Super Cache with no results … i tried to change the cache timeout from 600 seconds to 625000 seconds (1 week) without any results….

I tried others pluggin like LiteSpeed Cache, WP Fastest Cache, WP Rocket’s… without any change in my results.

Now I think this problem is from Divi Theme because I have checked everything else.

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