title: Lumen failed to open /../vendor/autoload.php
body: <p>I started using <a href="http://lumen.laravel.com/" rel="noreferrer">Lumen</a> upon its release in April.</p>
  <p>From version 5.0, I already faced this same problem and found a solution (<a href="https://stackoverflow.com/questions/30740023/redirect-root-of-web-server-to-the-public-folder-in-lumen">see here</a>).</p>
  <p>There are some days I proceeded to create a new project in Lumen (5.1). However, by applying the method with the <code>.htaccess</code> above, the problem doesn't solve it this time.</p>
  <p>Here is the full error :</p>
  <blockquote>
  <p>Warning: require_once(<code>path_of_the_project/../vendor/autoload.php</code>): failed to open stream: No such file or directory in <code>path_of_the_project\bootstrap\app.php</code> on line 3</p>
  <p>Fatal error: require_once(): Failed opening required '<code>path_of_the_project\bootstrap/../vendor/autoload.php</code>' (include_path='.;C:\php\pear') in <code>path_of_the_project\bootstrap\app.php</code> on line 3</p>
  </blockquote>
  <p>How to fix it?</p>