Can't make MixItUp work

Hi there,

I was very happy to discover the tutorial on how to use the MixItUp library inside Webflow as its a very useful feature. I followed all the steps and it seems to properly do what it has to do with the classes, but in the end the filtering doesn’t work.

I feel like I’m missing a tiny thing here, but I have re-read the tutorial three times without being able to tell where I do it wrong…

Here’s the page where I implemented it: Works

Here is my site Read-Only: