Transaction not yet indexed

537QtAVaa6S9bTsMJcUVPcr8zfccVQmxR4rrJFkiZDKZJkjfSkQridSHZmPUEP8aLFDR2qHcbtq8aFTNou9RCw21

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