Modx minishop2 why thumbs are not displayed?

Question

MODX

Template code:

The code for displaying a picture in a chunk:

<img src="{$thumb}" alt="{$pagetitle}" title="1{$pagetitle}"/>
 <img src="" alt="2">

Neither one nor the other pictures are displayed..
What is most interesting, thumbnails are not displayed in the admin panel either:

BUT, the gallery itself (inside the product) is displayed..
Pamagity)