I had seen that recently, but didn't when I just checked. My guess is that they opened the Steem/SBD trading back up in the last day or so (when I saw the Bittrex and Poloniex prices get back to being close to each other.)

It's hard for me to say for sure so I'd say if you try it, start by sending a tiny amount and make sure it completes. If all is good, can do the whole amount you wanted.