Calling the wpinv_complete_payment

Hi,

I have added below code to my functions.php child theme and when I submit an invoice for payment and gets paid, it is not triggering the action to my error_log.
Not sure if I am missing something to implement the code?

Here is my simple code.

function _wpi_wpinv_complete_payment( $invoice_id ) {

error_log(“yes it works” . $invoice_id);

}
add_action( ‘wpinv_complete_payment’, ‘_wpi_wpinv_complete_payment’, 10, 1 );`