Transaction not yet indexed

1UMB4g3nZcYEdmz9hCCmNQwzkY6LKGZS4qb3XP9UVYTiYEjR3GRbvSsRCa3Y3JGugigWMAf2qL4eiHQ8PL3fF66

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