Transaction not yet indexed

ppHe28EAtAS67BQsKb5Mpe2UUWEN3dJuMu2cVf9tKyYW1QSgCbsS54jUVaTfEwHyHXkEM9ESdmQPKFrWqWVjDe9

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