1
It seems that this is a compatibility issue. I briefly checked the Magento marketplace and found the Shop By Brand extension (I am not sure if you are using this particular one, I am just assuming you do), and in the compatibility section it mentions: 2.3, 2.2, 2.1 and NOT 2.4.
My intuition tells me that whichever extension you use in the 'shop by' suite, ...
1
The answer you linked to is correct, but you're looking in the wrong place.
You need to look in the theme folder, for example, if you are using Luma:
vendor/magento/theme-frontend-luma/module-catalog/web/css/source/module/_listings.less
You should really be creating/editing this file in your local theme.
Only top voted, non community-wiki answers of a minimum length are eligible
