Error when placing an order Unhandled rejection [object Object]

[Joshua Batty]

Hi, I am able to get information about my account but when I try and place an order as below i'm getting the following error.

acx.placeOrder({ market: 'audbtc', side: 'sell', price: 9495.04, volume: 0.0003 });

Unhandled rejection [object Object]

Can you confirm if i'm doing something incorrect? Thanks.