Transaction not yet indexed

NM91PtE5ZupRZe4cJd1dUfCyNWU8MU6VFLPLbxfBrUK8xJ9oRqk9knQ2jYUUNdUSSX4EoXWG9ATYEFiQYkKs43V

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