Transaction not yet indexed

Qu21uCYKZ5k7ATeDgWwQjYiEBdZBAd2RAqLknxgqeFMVi9gL1nKDPfBQUAFy7oBXD2yVrbphk6LEqFnm9TYDqKc

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