Transaction not yet indexed

Tu91KMo2KMCwuoXEFvfMrXmVzkVJS9taV1rzP9gCkPbb2k9o8GEFFMbtuj9UYv53oqCvAZpR4yvhRATmTbbtCCc

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