Обычно такая штука связана с выключенными сообщениями об ошибках в php
stackoverflow.com/questions/2687730/how-can-i-make...
а у вас точно есть файл ? /var/www/host/site.ru/wp-admin/includes/list-table.php
Check the error_reporting, display_errors and display_startup_errors settings in your php.ini file. They should be set to E_ALL and "On" respectively (though you should not use display_errors on a production server, so disable this and use log_errors instead if/when you deploy it). You can also change these settings (except display_startup_errors) at the very beginning of your script to set them at runtime (though you may not catch all errors this way):
error_reporting(E_ALL);
ini_set('display_errors', 'On');
After that, restart server.