Transaction not yet indexed

21Mp4RpbzxzhjZPCGrcFTSKjMQyQM3mLrTxdEUpYJSjVuJ9m5eA3Ub2biME7FRqj7yXYTR3KLWJKJdxd98LaFdh6

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