It's related to the HF: we're temporarily out of resource credits to send the Steem (a bug in the current calcuations allowed us to temporarily get negative resource credits, so we have to wait till it regenerates back to positive). There's a note up on our site at https://blocktrades.us about it. We'll send your Steem as soon as we can: short of another code update by steemit, that will be on Monday, sorry for the delay.