Warning: require(smarty/libs/Smarty.class.php): failed to open stream: No such file or directory in /index.php on line 2

Warning: require(smarty/libs/Smarty.class.php): failed to open stream: No such file or directory in /index.php on line 2

Fatal error: require(): Failed opening required 'smarty/libs/Smarty.class.php' (include_path='.:/:/usr/local/php56/lib/pear') in /index.php on line 2