Finsweet CMS Prev/Next Not Working

I’ve been trying to setup the Finsweet Prev/Next buttons in order to easily navigate through CMS pages but for some reason it does not seem to be working. I’ve set it up exactly as they’ve shown and run their support script and it recognizes the attributes but still won’t generate the clickable buttons. Would love if someone could take a look and let me know if they have any solutions!

Here is the read-only link and the current staging site

Any tips or solutions would be greatly appreciated!