Warning: require_once(./include/smarty/libs/Smarty.class.php): Failed to open stream: No such file or directory in /var/www/piwigo/include/template.class.php on line 13

Fatal error: Uncaught Error: Failed opening required './include/smarty/libs/Smarty.class.php' (include_path='.:/usr/share/php') in /var/www/piwigo/include/template.class.php:13 Stack trace: #0 /var/www/piwigo/include/common.inc.php(108): include() #1 /var/www/piwigo/index.php(11): include_once('...') #2 {main} thrown in /var/www/piwigo/include/template.class.php on line 13