title: Log file is not being written in Laravel 5.5
body: <p>I have logging enabled by default on Laravel 5.5.</p>
  
  <p>The settings are:</p>
  
  <p>In <code>config/app.php</code> file:</p>
  
  <pre><code>'log' =&gt; env('APP_LOG', 'single'),
  
  'log_level' =&gt; env('APP_LOG_LEVEL', 'debug'),
  </code></pre>
  
  <p>In <code>.env</code> file:</p>
  
  <pre><code>APP_LOG_LEVEL=debug
  </code></pre>
  
  <p>If any error happens on the application, I can see the exception page. But I don't see it in the log file anymore. It was working fine a couple of months ago. Even when I try to log manually, it does not log it.</p>
  
  <pre><code>Log::debug('Notification');
  </code></pre>
  
  <p>I have code to create files using <code>Storage</code> and it's working fine. So, I don't think it's some permission issue. What could be the reason behind this?</p>