How to combine twig and phpmailer?

Question

PHP

Hello, I'm trying to make an html email using twig, but I always get an empty body error. What am I doing wrong? Here is the code:
$mail->msgHTML($app->render('email.html'));

Answer 1

This is probably how it should be:
$mail->Body = $mail->msgHTML($app->render('email.html'));
$mail->IsHTML(true);
or $app->render('email.html') returns null