I was about to reply to your email, but I'll reply here instead. The blocktrades account temporarily ran out of resource credits due to an unfortunate combination of circumstances: the high cost of the account claim operation, a mismatch in the costs reported for this operation on 0.20.4 (which our wallet was running) and the new 0.20.5 which was released late last night, and a few witnesses that were still running older versions of the code that allowed the claim operations to process and push our RC into negative territory. Fortunately one of our admins noticed it was going negative and stopped it before it went too far. Our account is recovering RC now and we'll process any outputs that failed as soon as our RC goes positive again Monday afternoon (including yours). We've also posted a warning on our site about purchasing Steem-related assets until then: basically any purchase before Monday is treated as a pre-order.