title: Prestashop installation stuck on a redirection loop
body: <p>I am trying to install prestashop on a vm with os <strong>ubuntu-16.04.1-server-amd64</strong><br>
  Once <strong>prestashop 1.7.0.4</strong> gets extracted it gets on a loop with redirection on the welcome page <br>(url: <code>example.com/install/index.php?step=welcome</code>)<br>
  I already installed <strong>apache2.4</strong> and <strong>mysql 5.6</strong> (also tried before with <strong>nginx</strong>).<br>
  Using Firebug and Firefox i get 21 redirects along with a message in the end <strong>The page isn’t redirecting properly</strong>.<br>
  The error seems to come from a function that repeats itself because language isn't set or something else, the file that redirects to the welcome page is located here <code>prestashop_html\install\controllers\http\welcome.php</code></p>
  
  <p><strong>Screenshot 21 loops</strong>
  <a href="https://i.stack.imgur.com/LrtY4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LrtY4.png" alt="enter image description here"></a></p>
  
  <p><strong>Headers received from server</strong> (along with <code>Location: index.php?step=welcome</code>)
  <a href="https://i.stack.imgur.com/vdxHr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vdxHr.png" alt="enter image description here"></a></p>