Slider and features page don't show up at frontpage

Hi,

The slider and features page suddenly disappear when I get into my site where the rest of all pages are intact.

Log into the dashboard, at Appearance > Customize, the slider and features page are there as usual. I tried to disable (and saved) and enable (and saved) but it still won’t show up. Tried delete cahce didn’t help though.

Could anyone please help to take a look? Here’s to my site.
Thank you.