I have recently upgrade CodeIgniter from 3.1.3 to 3.1.4, now gives me this error
Warning: require_once(/opt/lampp/htdocs/social/system/core/CodeIgniter.php): failed to open stream: Permission denied in /opt/lampp/htdocs/social/index.php on line 315
Fatal error: require_once(): Failed opening required '/opt/lampp/htdocs/social/system/core/CodeIgniter.php' (include_path='.:/opt/lampp/lib/php') in /opt/lampp/htdocs/social/index.php on line 315
I am using ubuntu 16
Thanks in advance.