How do I add a DinoIcon to my New Dino

I managed to create a new rex, but the icon is blank, and in the arkdevkit when I try expand the selection, there is no original dino icon to select, only a bunch of irrelevant stuff to choose, not the flashing icon. Anyone knows what’s wrong here?

I have tried to even use one that is just random in the past and it still shows blank… seems like a coding thing.

BUMP: I’ve been struggling with the same issue, anyone else found a way around it or is it truly hard-coded and unreachable…?