Warning: require(/var/www/html/wp-includes/version.php): failed to open stream: Cannot allocate memory in /var/www/html/wp-settings.php on line 33

Fatal error: require(): Failed opening required '/var/www/html/wp-includes/version.php' (include_path='.:/usr/local/lib/php') in /var/www/html/wp-settings.php on line 33