Warning: require_once(./lib/pkp/lib/vendor/smarty/smarty/libs/plugins/modifier.escape.php): Failed to open stream: No such file or directory in /var/www/html/lib/pkp/classes/template/PKPTemplateManager.php on line 69

Fatal error: Uncaught Error: Failed opening required './lib/pkp/lib/vendor/smarty/smarty/libs/plugins/modifier.escape.php' (include_path='.:/usr/local/lib/php') in /var/www/html/lib/pkp/classes/template/PKPTemplateManager.php:69 Stack trace: #0 {main} thrown in /var/www/html/lib/pkp/classes/template/PKPTemplateManager.php on line 69