Transaction not yet indexed

21EXx66SNXCK1sTuYZKMbpktGxRbGyaopGDfLdNb1RgmGjSECpt53ZBzyknu5iSo9gw188zmo6sJAkUxNW6J8fp8

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