So I can open the materia screen from my menu. I can click on a weapon and choose one of its empty slots and it will come up with a drop box of materia, and their effects do kick in. However there won't be any words saying what the materia does, its list of skills, its AP. It just comes up with a star (i assume its mastery level).
I don't believe it's any of my other plugins as i tried disabling all my plugins and it made it worse.