Remove category image by displaying grouped by category

-- url of the page with the problem -- : www.foliewinkel.com/zwembaden/zwembadfolie
-- HikaShop version -- : HikaShop Business 4.2.1.
-- Joomla version -- : 3.9.12
-- PHP version -- : 7.3
-- Error-message(debug-mod must be tuned on) -- : can someone tell me how to remove the category images while keeping the grouped by category on the page.
with the option disable category image, this is already off.

can someone tell me how to remove the category images while keeping the grouped by category on the page.
with the option disable category image, this is