Transaction not yet indexed

21n91gfTTiPGSpS4Ue5DY6oEjoUHoKXSXQekJ2DiqpA6PC4zbW4e9RcYzcEGTAXtpVXd2Zd6E4WH3MzKNnYZPNa7

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