When previewing my pages with a live server everything works fine.
but when I tried to open my index file from local it didn’t show CSS or anything.
and when click on navigation that links to another page it shown "File not found"
>Solution :
first of all, please provide code with your question. Second of all, I had this once happening to me, I fixed it by changing (this is an example) /CSS/style.css to ./CSS/style.css
So you basically put a dot in front of it. Please let me know if this helps.