Fatal error: Uncaught PHPMailer\PHPMailer\Exception: Invalid address: (to): in /home/mireya/public_html/clinic/mm/PHPMailer.php:1004 Stack trace: #0 /home/mireya/public_html/clinic/mm/PHPMailer.php(934): PHPMailer\PHPMailer\PHPMailer->addOrEnqueueAnAddress('to', '', '') #1 /home/mireya/public_html/clinic/mm.php(29): PHPMailer\PHPMailer\PHPMailer->addAddress(NULL, NULL) #2 {main} thrown in /home/mireya/public_html/clinic/mm/PHPMailer.php on line 1004