Transaction not yet indexed

Mb6tiWCAktstMznw7sUdWeB6ZqWfhtbV7wF8aTsMb4yP5kXw3ZtqQXiu6kjoC4Q4BFQ8REWFWmLcxrJj5y65jFA

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