Fatal error: Uncaught Error: Class 'Twig_BaseNodeVisitor' not found in /var/www/html/bsuedu.ru/htdocs/bsu/education/schedule/lib/Twig/NodeVisitor/Optimizer.php:22 Stack trace: #0 {main} thrown in /var/www/html/bsuedu.ru/htdocs/bsu/education/schedule/lib/Twig/NodeVisitor/Optimizer.php on line 22