Menu Button doesn't show the nav bar on mobile


I just started a few days ago working on webflow and while I have watched the tutorial on NavBar. I am found myself stuck…

In preview mode, when I am on mobile devices, the menu button doesn’t expand and doesn’t display the nav menu. it’s not clickable even though I have just used the nav bar element from webflow.

I’ve read some stuffs about z-indexes which I tried but didn’t manage to find something working.

any help would be appreciated. Sharing my read-only link below:

Thanks in advance!