Transaction not yet indexed

5Kb91aUjEPC39u52jQGTgWZrSSCqMqWuaqvPSaGA5sNTCtuRGyiSec9VRR15TMiPc5YcchnEfnpbiNcATMHGCJkw

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