That's because it passed the cutoff date for removal last Friday.
The pool was terminated, as the new pool servers and setup are currently being built for migration across from the old pools.
SIGT had gone PoS a couple of weeks ago, and as such, CWI-Pool Signatum was set for decommissioning on Friday 21st October 2017, and requests were made for owners of any accounts to empty their funds into other wallets, which would have been terminated after the cutoff date. As it stood, we kept the pool open a few days longer for the stragglers to remove funds, then terminated.
CWI-Pool Signatum is no longer available.
#crysx
OMG !! My sigt coin in pool TT . Can withdraw this time ?