Transaction not yet indexed

iSS99ccpFyU59vwfPKGodBUNEqUu6Jjxg6GD5moZPvb6dKtkWvPtb6KWykFTJ6c2dbrWBsv7zhFuKtSw7uHkXEm

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.