Diablo Auction House Error 31073

I've currently getting error code 31073 when creating any auction on the Diablo 3 gold and real money auction house on the EU servers. I've submitted a support ticket to Blizzard:

Hello Blizzard,

I'm getting error code 31073 when creating auctions on EU gold and EU real money auction houses. Is there anything I can do to avoid this error when creating auctions?

Thanks

/Roger

I'll keep you posted when the customer support reply to the ticket.