Transaction not yet indexed

AmUb7bkcJitUE3rb8Ax1PqLWeT1U8vEcSMo4au1HGhAVTq1umkdw3yp7io1e6k2Rb8mSkLYvFBWSb2WqqXNDj6E

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