Transaction not yet indexed

MpH4pxrSExSgQ2FtZeuRcSb1uBWFw9KsN8bKNYZ7c2mchn2UkcfB2co1cdb3MpcEMYbhxC4WQS2WD3vzDv3JZ63

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