Transaction not yet indexed

21NUSw9XApsdPjaYEyAVNDba6ffDLZ37NSanvGRQYo7H6m5Q1FusKdDfJSvcGaCKDwttCNTEAd4SKn6d3CxUqU53

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