Region: US
Server: Valencia 1
Bug description: I put a socket on my costume. When I try to insert a crystal in the slot, they're all greyed out and cannot place any in the socket.

You need special costume crystalls, to get those you will need crafted costume and costume Coupon from pearl Shop, and last one isnt ingame yet

you can make 3 crystals

Move speed, Crit, and Attack/Cast speed.

Each requires a different "crafted clothes" under armor. once you have the costume which provides the buff you want you, need to get a Equipment tailoring coupon form the pearl shop, which as of my post now I do not see now in the shop. (it should be under: Function - Misc - Equipment Tailoring Coupon 1,500 pearls)

this is NOT a bug and is working 100% as intended. we just don't have access to the other item needed for the crystal.