Translation:Do you have any siblings?
I think "Do you have siblings?" would be a correct alternative. Reported on Nov. 19, 2017.
I just reported this too in mid December! Mine was marked wrong for, "Do you have siblings?" Beta is giving me a headache.
I have also reported this 01/05/2018. I hope they add it as an option soon.
Yes both with and without "any" should be accepted. "Sibling" is fairly technical in English and not used in daily conversation that much.