title: Can't send mail with Lumen framework and no error appears
body: <p>Since yesterday I have had problems sending emails with Lumen. I think I have followed all the steps in the documentation correctly, but unfortunately I cannot send anything. Moreover, no error is displayed (I have activated <code>APP_DEBUG=true</code>), and I am sure that the credentials of the smtp server are correct. I also did <code>composer require illuminate/mail</code>.</p>
  <p>Here are my modifications in <strong>bootstrap/app.php</strong> (I have <code>$app-&gt;withFacades();</code> uncommented).
  <a href="https://i.stack.imgur.com/PVo5R.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PVo5R.png" alt="Git changes on bootstrap/app.php" /></a></p>
  <p>Here is my build function content: <code>return $this-&gt;view('emails.mailTemplate', ['message' =&gt; $this-&gt;message]);</code>.</p>
  <p>And the line of code that ask to send mail: <code>Mail::to(&quot;wewanthalflifethree@gmail.com&quot;)-&gt;send(new sendMail($destEmail, $subject, $message));</code>.</p>
  <p>Did I do something wrong? :/</p>
  <p><strong>Thx in advance for help!</strong></p>
  <p><strong>EDIT: I just noticed something, the code stop working when I send the mail. If I add an echo after Mail::send, it will be appear on the page.</strong></p>