Warning: require_once(/var/www/staging/htdocs/includes/errors.inc): failed to open stream: Too many open files in /var/www/staging/htdocs/includes/bootstrap.inc on line 2603

Fatal error: require_once(): Failed opening required '/var/www/staging/htdocs/includes/errors.inc' (include_path='.:/opt/rh/rh-php56/root/usr/share/pear:/opt/rh/rh-php56/root/usr/share/php') in /var/www/staging/htdocs/includes/bootstrap.inc on line 2603