Slider hides top menu

I’m using the animals theme on my website. At first I could see both the top menu and the slider working well but now I can’t see the menu. The menu tends to appear and then disappear immediately when I refresh the page. I can only see the menu after disabling the slider. I really want to see both my menu and the slider working well on my site, please help me fix it. Thank you.

The page I need help with: [log in to see the link]