[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/class_loader.php on line 160: require([ROOT]/phpbb/template/twig/extension/username.php): failed to open stream: Too many open files in system

Fatal error: require(): Failed opening required './phpbb/template/twig/extension/username.php' (include_path='.:/usr/local/lib/php') in /var/www/html/permutas/phpbb/class_loader.php on line 160