Thank you @JKingpin !
It was a great live, so much good info about IKrigs and UI.
I solved the problem yesterday though. I was missing the Actor Blueprint.
It was a bit confusing because the + sign to create a new Actor Blueprint is not intuitive and sometimes it doesn’t show. As opposed to the Retargeter option, where you have a “Create new asset” option on the drop-down menu.
I thought I had to select the Actor blueprint there (something like the parent Third Person Character Blueprint)