MixItUp Multifilter doesn't work

Hi,
I am creating my first Webflow page. I am trying to filter articles with 4 categories. So I created 4 filter groups.
The problem is: When I click any of the filters all the articles disappear, and when I click Clear filters all the articles are back. Where is the problem, because I can not find it.

The link: https://preview.webflow.com/preview/tribe-leanstr?utm_medium=preview_link&utm_source=designer&utm_content=tribe-leanstr&preview=c038afb70d0bc75df903f44e6bb9570a&pageId=5df296a379e72505288161aa&mode=preview

I really hope someone is able to help me!

Thanks in advance!

Hi @ursa,

Your articles disappear because they do not have any class reference to your categories. You need to set the name of the category as the class name, not "“filter-category”.

Hi @anthonysalamin,

Articles are CMS content and also Checkboxes, that is why I give the same class .filter-category. I followed this tutorial: Multi-dimensional filtering for CMS content

You are saying that I need 4 different filter-categories?