hikashop cart module class suffixe doesn't work

-- HikaShop version -- : 3.2
-- Joomla version -- : 3.8.1
-- PHP version -- : 5.1
-- Browser(s) name and version -- : chrome latest version

Hi,
I need to hide "hikashop cart module" on cellphone devices. I've used this code " hidden-phone" into module calss suffixe.
Unfortunately it doesn't work.
How can I do?!
My screenshot attached.

Hi,

That class suffix is usually added by the template to the cart module's main div.
Can you switch temporarily to the default template and see if you get the class.
Also, do you also have the CSS code necessary for that class to hide the div when on cellphone devices ?
Could you provide a link to a page of your shop with instructions to reproduce the problem ?