Hey there,

I am really sorry for the delay of this reply as it is a public holiday for us here.

Based on what I checked, it seems like your existing post doesn't have any post cover, so it will not show any image on the blog listing page.

If you would like always show first content image on the blog listing page, you have to enable this setting 'First Image as Post Cover' from backend > Easyblog > setting > layout > post cover .

So system will take one of the content image display on the listing page.

By the way, I noticed your server has enabled 'x-sucuri-cache', can you temporary disable it first when you update some setting from backend? Because I did tried to enable/disable it, it seems like your server did cached it, I was unable to see the changes on the frontend when I enable/disable that setting.