I know this is an old post, but hopefully someone still reading it.. I have the same issue, i edited cashshop.csv and cash_itemlist.csv and changed "Cash" option to 0 for every item to make the dshop 100% free for players.. I copied the cashshop.csv and cash_itemlist.csv to client share as well and now I get this error. I logged into the server and tried to purchase, all items show 0 cost, but I get this same error when I actually try to purchase it. Anyone know the right way to make dshop 100% free?