Message could not be sent. Mailer Error: object(PHPMailer\PHPMailer\Exception)#2 (7) {
  ["message":protected]=>
  string(42) "Could not access file: C:/php_app/test.pdf"
  ["string":"Exception":private]=>
  string(0) ""
  ["code":protected]=>
  int(1)
  ["file":protected]=>
  string(58) "C:\php_app\GestioneAzienda_4.0\PHPmailer\src\PHPMailer.php"
  ["line":protected]=>
  int(3405)
  ["trace":"Exception":private]=>
  array(1) {
    [0]=>
    array(6) {
      ["file"]=>
      string(53) "C:\php_app\GestioneAzienda_4.0\utility\UtilityFab.php"
      ["line"]=>
      int(34)
      ["function"]=>
      string(13) "addAttachment"
      ["class"]=>
      string(29) "PHPMailer\PHPMailer\PHPMailer"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(1) {
        [0]=>
        string(19) "C:/php_app/test.pdf"
      }
    }
  }
  ["previous":"Exception":private]=>
  NULL
}