Thumbnails not showing in Autocompleete

Hello,

I have installed the Swiftype plugin and indexed my content into the online Swiftype platform.

I then customized the autocomplete feature and changed the style to show thumbnails in the autocomplete.

I then followed the instruction and placed the script in my site header.

On my live site, the autocomplete feature is working, but it is only showing post title and not the thumbnails.

What am I doing wrong?

Here is my site address www.sup.co (search bar is in the middle)

Thanks