CMS with Isotop plugin help

[Eyed]

hello all!

I try to make a filters buttons with Isotop Plugin through this tutorial:
https://mixitup-filtering.webflow.io/mixitup-plugin-dynamic-content

something is get wrong
I don’t find what i missed

help please

Thanks!

https://preview.webflow.com/preview/f2vc-b5bef1f9e469314580fd-052828d3ab55d?utm_medium=preview_link&utm_source=designer&utm_content=f2vc-b5bef1f9e469314580fd-052828d3ab55d&preview=033bda0a3d6b71f3b4925df8e989241f&pageId=5e9fd8f4065dd60db31e20df&mode=preview