Doesn’t seem to work

Create a section on the page you want to call the popup from (I add mine at the bottom of the page). Add whatever elements you want in the popup. Give the section the CSS class of ‘popup’ and give it a unique ID. (As soon as you assign the class you will see the class attributes applied.)

To trigger the popup from a button, just assign the link #uniqueID (whatever ID you gave the popup).

I did all of that. Please see screenshots:

https://abload.de/img/divipopup1n1k8b.jpg
https://abload.de/img/divipopup2pqkt8.jpg

Any ideas here?