Transaction not yet indexed

5U21qXm5yfjcHsdyqCZyHzfhG8MzKPyFa6hfCFbfdXQCGCidVgUMk6JZ295FtY1aQPpt9e1L4tJg9MJvbrJCSUN4

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