Transaction not yet indexed

21UbWSKtVwFhUZio25KxKdWicEWQu2h8fLZKaTA15fCCrRZmmMP2uYzHcKbub6tvrQZ5Qh495Ca2idFxDVJDPcL1

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