Transaction not yet indexed

ME2XXeSTvdJP3kxxc5aNTyerhYDNWWwSPLbxH2NjWNZ5YGNgdQf7dHMfYdh6S5YU9UUWqcuPafinCeW1TqHUKNE

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