Carousel Theme Design 3

Hi, I using the Desing 3 theme and has a carousel with the latest articles published, but it does not show the feactured image of none of my articles.

Attach photo links as shown and as it should be displayed:

(Image 1): Image 1
(Image 2): Image 2

(Image 1): So it´s on my website a gray box
(Image 2): So it´s the design that shows the plugin

In my plugin settings it appears as follows: Settings

I hope you can help me solve this problem. Thank you.

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