CMS animation now working

Hello everyone, I’m having some difficulties with an animation in a CMS collection. I imagine it’s something quite simple that I might be doing wrong, but I just can’t get it to work at all.
What I want to do is, in this section(image below)

, when I click the “read more” button, the corresponding description of the CMS item should appear.

Here is my public share link: Webflow - European Plasma Alliance