Transaction not yet indexed

21Ku191cNA8f4ew9DpvtbtACfbjV7B9fuddTxtktBRYY8uu1jsrCyJibUVnMYQ9ws8ZzUFE75ub7k1rWWEsqkBJC

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