Transaction not yet indexed

MXu21zxjqu7dfj74rZfQnpdkXCg4Wd2LU6UZ6ST5Rvr6bJbT4QVNHv2WBmZFX1WdaXi4yfE3Y5z5JbFdgdZofnM

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