Warning: require_once(../process/process_buy.php): failed to open stream: No such file or directory in /var/www/htdocs/shop/index.php on line 8

Fatal error: require_once(): Failed opening required '../process/process_buy.php' (include_path='.:/var/www/common:/var/www/common/') in /var/www/htdocs/shop/index.php on line 8