Hello @gluka,

As far as we have checked the theme locally it is working absolutely fine as you can see in below screen shot:
http://image.prntscr.com/image/38770cd2672f4880ac88e2a8368e9058.png

So please once verify whether you have changed the original code in the theme to display the column or not ? If you have then please do not make the modification directly in your original theme as the original modification will be lost .

For the fix you need to activate the child theme . After activating the child theme in your child themes functions.php file paste below given code .

function loop_columns(){
  return 3;
}

add_filter( 'loop_shop_columns', 'loop_columns', 30 );

Hope this helps.

Best Regards!!

Hello @gluka,

You can simply create and activate the child theme manually by taking the references from the link below :
https://codex.wordpress.org/Child_Themes

You can also create the child theme by using plugin and below is the link to one of them.
https://wordpress.org/plugins/wp-child-theme-generator/

Then after creating the child theme in your child theme functions.php file paste the given code .

Hope this helps.

If you have any confusion further please let us know.

Best Regards!!

Hello @gluka,

Nice to know that your issue is solved .

If you have any issue further, please let us know .

Best Regards!!