Slider unable to add slides

Hello, my slide Nav is empty and i can’t add more slides.
when i click the button of the slider menu in the element setting it doesn’t open
thanks

https://preview.webflow.com/preview/haimke-1?utm_source=haimke-1&preview=6869451d0bd9c7ae5c9ad0f8cdd935df


Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Everything seems to work fine here:

https://cl.ly/25610f

i could used slider properly before, but suddenly something happened
so probably the problem is in my computer
i use windows 7

what could be the reason?

Can you try it in incognito mode? That might be because of your cache or browser extensions.