Transaction not yet indexed

5S21RGT77s3ymgPGQiWfy51dT3S5Bt4AQRaAav2yfcUZ5x5G2PbCbyomEUgCcjg9PMLGUcA1NGyQwXYZTPkLENVi

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