Sliders Suddenly Disappeared

Hi there!
The sliders suddenly disappeared from my site. I can’t even see them when I try to fix the problem with the WP Bakery Editor. I can however, see something on my live website, which I’ve included below:

Homepage – townofbigsandy.com
[rev_slider_vc alias=”home-slider”]

About page – townofbigsandy.com/about/
[rev_slider_vc alias=”about-slider”]

Please let me know what I need to do to fix this. It looks really awful right now. Thanks so much!