Author profiles

Hello, I’m considering buying the Pro version of your plugin, but currently the Free version doesn’t work as it should.
I need to display many authors in this post: https://ipsedizioni.com/prodotto/guerre-costituenti-spazi-dimensioni-narrazioni-del-conflitto/
Unfortunately only one author appears and when I click on his profile I am directed to my profile. This also happens with all other authors. Why this problem?

The page I need help with: [log in to see the link]