iSeeD

I have problem with Crawl tabs in admin area
Error: Call to undefined method IPS\core\modules\admin\promotion\seo::_manageRobotstxt() (0)
#0 /var/www/../data/www/../forum/system/Dispatcher/Controller.php(101): IPS\core\modules\admin\promotion\_seo->manage()
#1 /var/www/../data/www/../forum/applications/core/modules/admin/promotion/seo.php(53): IPS\Dispatcher\_Controller->execute()
#2 /var/www/../data/www/../forum/system/Dispatcher/Dispatcher.php(153): IPS\core\modules\admin\promotion\_seo->execute()
#3 /var/www/../data/www/../forum/admin/index.php(13): IPS\_Dispatcher->run()
#4 {main}