[phpBB Debug] PHP Notice: in file /common.php on line 224: main(./includes/hooks/index.php): failed to open stream: Too many open files

Fatal error: main(): Failed opening required './includes/hooks/index.php' (include_path='.:/opt/oracle/portal/lib/php') in /opt/oracle/portal/Apache/Apache/htdocs/diendan/common.php on line 224