Transaction not yet indexed

Am55smcMSd3KzG5uudeZz9gZHem1aChhvEAdMJgMQLzfF5WttCVPrm9DtAwzkB8LmSW9cTJvD2LUQa47r8aj7JW

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