Fixing Toniebox's dreaded code word "Fox"

My children recently received a Toniebox 2 for Christmas. It’s a cute little speaker cube that you operate by sticking plastic characters on top of; the characters have an RFID that tell the box what content to download and play. This unit worked great for about a month until one morning when it wouldn’t do anything, even after charging it, except repeat “Uh oh! Look up code word ‘fox.’ Contact…