Not working Infinite scroll settings for Flatsome theme

Theme: Flatsome WooCommerce WordPress Theme
At first I can enter in the four boxes on the infinite scroll options in wordpress admin page like this http://s.w.org/plugins/infinite-scroll/screenshot-1.png?r=905395 (data is other)

But this only for TwentyTwelve theme, I can’t set this for current theme (Flatsome WooCommerce WordPress Theme).
Buttons “save” and “cancel” is hidden for all themes.
http://imglink.ru/show-image.php?id=84ccf96fdc31a426e67c6f7eab78756d

Thanks!

https://wordpress.org/plugins/infinite-scroll/