Transaction not yet indexed

21MB5eTaDwoKfU7jMtksDPGSP1cEFGDY4ttzN6nbiU2kC15YLxfaPJrr2PQ56JbhaxjAvpbRuDciEsFVeJ8ZHUMS

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