Transaction not yet indexed

MkEML3MA3MqXmF944uJTaW6HTLRJvMFGJHjcfqdfdCgnoBe2eaQhRVBaLNQcpnbPLaHwgt7qC8Tg43eTTQ6rJNE

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