title: Warning: session_start(): open(/var/lib/php/session error
body: <p>I am currently using Opencart 1.5.5.1 shopping cart software and have recently encountered an error. My sites frontpage has gone completely down and when I attempt to login via the admin side of the store I receive the following error:</p>
  
  <pre><code>Warning: session_start(): open(/var/lib/php/session/sess_gbatrqu15lf22fbb0cprgjlrs5, O_RDWR) failed: Permission denied (13) in /var/www/vhosts/andysmotorcycles.com/httpdocs/system/library/session.php on line 11
  </code></pre>
  
  <p>I have checked line 11 and it is simply the <code>session_start()</code> command.</p>