FE_Builder_GBA Battle Animation Freeze

Posted this question under FBuilder but I wish to this fixes soon. So I’m testing the FE7 Rom and when Lyn is in her battle animation and the game just freezes. I didn’t mess with her animations or anything and I’ve reset it multiple times but it is still happening. Do you know how to fix this problem?
Her animations are untouched:
I added two custom animations to a custom class in the game. Maybe that’s the problem?
Edit: I did mess with Lyn’s base stats. Is that a problem?