Sending a email template via a hook

I looked the data over and it all data returned normal

(
    [0] => tazio2003@gmail.com
    [1] => Invoice #00025
    [2] => Array
        (
            [sum] => 750,
            [page] => OrderPage Object
        )

)

code:

error_log(print_r([$to, $orderNr, $data], true));