I am trying to withdraw to an address ( 35YWpZi1X5ie7DvHRRkYVrvFFfs4xe9vep ) which I know is valid but it gives "Invalid Receiving Address.". Any ideas?
got the same problem, and i just made a new address and it works...
, it is an old problem and apparently SD hasn't fixed it yet. In the meantime, use an address starting with 1 to withdraw your bitcoin.