Transaction not yet indexed

21M8zxRJujbgcyfoeoKKmHZ3j2C6jmMTjvUMN5QD9ejMo69HjXBRUq6W2qNNDYmnD4wk7Cn9vdBkUbvA2S1f4Wnm

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