I have 10 shares short of the "How much will Augur raise?" market. I try to redeem my winnings and I get the message "Account balance too low or account does not exist". It looks like I have an account "Coinbase: 0x199758d97a25c4411817c222f3fcde8ab84a7385" and I don't why I need a balance to redeem winnings.
How can I redeem my winnings?