I've tried 3 different characters, one lvl 1, one level 3, and one lvl 14 multiclassed and all of them have incorrect values. None of the skill values came over, proficiency bonus is wrong, multiclass didn't come over, passive perception didn't come over correctly, hit dices didn't come over, and none of the AC or initiative values came over either. From what I can tell, the only real things that worked was proficiency, maybe equipment, and features.
I'm pretty disappointed with this. The script is super easy to setup and use but it just doesn't appear to work. Brand new game with no other scripts or character sheets running in it.