This is definitely a unique error. I have passed this onto the developer and will give you an update as to when this is fixed. Please keep an eye on that TXID in the meantime in case it updates!

Edit - It was just a game of patience, the blockchain has just processed the TXID:
https://blockchain.info/tx/3ac804d2badd97a91b6f45e742f32903f48c678fb739f1041726c07f9f411795