Transaction not yet indexed

Nu9B21aTFs4Ut9eYd9eMrELQ4DrVAgiy7WGQMWH71uDEdMz8sFo7fRADYVJwkyoouMxen5CQeVmX7F6KrLGutS8

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