title: CodeIgniter Session Error - Unlink Operation not Permitted
body: <p>I'm trying to debug this CodeIgniter issue I am having with my application.  I cannot figure it out so I was wondering if anyone else has come across this and could shed some light on it?</p>
  
  <p>This occurs randomly when a user is logged in.  The user could be browsing and all of a sudden this error pops up.  Refresh the browser and it's gone.</p>
  
  <p>CodeIgniter 3 </p>
  
  <p>Thanks!</p>
  
  <pre><code>A PHP Error was encountered
  
  Severity: Warning
  
  Message: unlink(/tmp/ci_session0189a7f1c86eb18fb70afcfedc2d5040e9c23146): Operation not permitted
  
  Filename: drivers/Session_files_driver.php
  
  Line Number: 346
  
  Backtrace:
  
  File: /home/*****/public_html/application/controllers/User.php
  Line: 5
  Function: __construct
  
  File: /home/*****/public_html/index.php
  Line: 292
  Function: require_once
  </code></pre>