PHP Strict Warning

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method simpleal\Sial_Admin_Common::addAdminScryptesAndStyles() should not be called statically in D:\…\wp-includes\plugin.php on line 496

The Dismiss link on the slider page point to: http://localhost/wp4.1/wp-admin/?welcome=0

https://ww.wp.xz.cn/plugins/simple-al-slider/