That's weird. Is it all the packs, or just some of them?
I'll test them out now.
EDIT: I just tested every picture and they are working. Seraph male/futa's body and portrait names didn't match up. One futa gnome had a typo. But that was only affecting the new "Assign both" checkbox. I'll re-upload those within the day.
You've been playing this game a while so this is a long shot but... Have you put the portraits in the portrait folder and the bodies in the bodies folder? User>**yourusername**>AppData>Roaming>Strive