Transaction not yet indexed

iSt55ENau4MKXXsHTH9YjCxKoYDYPq7LXFjJRbKpFHqEWzo1w5U7ANDVLLEQjVxY3QAHSUTPW1sXTxMo3ZKCYwJ

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