PHPMailer doesn't send message or output errors - php

Question

I just downloaded phpmailer from github and uploaded to shared hosting.
I made file called mailer.php and added this code (example from git-page):
When I start this (open file) Nothing is echoed and no mails are received. If i try to echo anything like any text after this code it won't do it but if I put it before it will echo it out.
I looked up Here but nothing from answers works here...
<?php
require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';
$mail = new PHPMailer(true); // Passing `true` enables exceptions
try {
//Server settings
$mail->SMTPDebug = 2; // Enable verbose debug output
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'mail.mydomain.com'; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'email'; // SMTP username
$mail->Password = 'password'; // SMTP password
$mail->SMTPSecure = 'ssl'; // Enable TLS encryption, `ssl` also accepted
$mail->Port = 465; //shared hosting ssl port
//Recipients
$mail->setFrom('email#mydomain.com', 'Site Title');
$mail->addAddress('myGmail#gmail.com', 'Soma name'); // Name is optional
$mail->addReplyTo('email#mydomain.com', 'Info');
//$mail->addCC('cc#example.com');
//$mail->addBCC('bcc#example.com');
//Attachments
//$mail->addAttachment('/var/tmp/file.tar.gz'); // Add attachments
//$mail->addAttachment('/tmp/image.jpg', 'new.jpg'); // Optional name
$mail->isHTML(true);
$mail->Subject = 'Here is the subject';
$mail->Body = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
$mail->send();
echo 'Message has been sent';
} catch (Exception $e) {
echo 'Message could not be sent. Mailer Error: ', $mail->ErrorInfo;
}
?>