Mixitup not working

I’m new at this site and beginner in all this website building stuff. I tried to follow a guide to make filtering on my portfolio image display, but I can’t get i to work at all…
The site is not done at all, but I dont feel like making more before this works

Can you see what I do wrong?

https://preview.webflow.com/preview/steffanis-dandy-site?utm_medium=preview_link&utm_source=designer&utm_content=steffanis-dandy-site&preview=7aa9a1099cf0fcaa87b98968e454cfe7&pageId=644b76badb58743627f85320&workflow=preview