several possible errors (i tried to fix them and even made a card from scratch, but all in vain): 1) in the studio there are problems with joint adjustment - you need to load another card FIRST, and then change character 2) you cannot edit accessories in the material editor in the studio - just click on another character with the material editor open, and return

hide mask - hide #21 acc hairpin hide seal - accs #19 and 21

you may also have a problem with loading knee pads - to be honest, writing a tutorial to fix it is very tedious