Transaction not yet indexed

528tFABiB7sgCmBKkqpPMVB1Mfpu1AdnjAxUQBbiU5rbKm1MPg3diwf73z35TQMLBJErAGnUXdE9N7PZcbSFMKq2

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