Transaction not yet indexed

NmUK91QjqqYv4ctabqSDdD8HcdE5AwTF69N1xdmw4a8QKtEk2rJN2QNCgxjhipZ8Ex3STxBgykP7XnSNsG65LTm

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