Hi! Could you tell me a bit more about the issue?
Is the font missing only in the Materia scene, or throughout the entire game?
Also, are you using any font or UI-related plugins? If so, please let me know which ones you're using.
The Materia plugin itself doesn't modify or load fonts, so it should be using whatever font your project is already using. Knowing a bit more about your setup will help me narrow down what's causing the issue.