What heads gears are you using?
I really haven't found one that DOES work, but examples would include Seraphim Coronet, White Drooping Eddga Hat, Devil's Hand, Illusion Apple o' Archer, Mob Scarf, Oni's Horns, even older ones like Crunch Toast, Puppy Love, and Feather Beret error. Tested by going to Payon castle to get my stuff auto-unequipped, opened the equipment window, and I could put any other body armor on my character. As soon as I put any headgear on, the game crashes. The only difference I can note is that 1st/2nd classes with older headgears seem to freeze the client, whereas newer headgears on 3rd classes full-on crash.
If I had to guess I'd say it's an issue with the sprite display in the equipment window. Storing, dragging, dropping, acquiring the heagear doesn't cause any issue otherwise.
Edited by Hikari, 12 August 2020 - 08:33 PM.