permalink post name issue

After migration my site I cant go my site's url.It says
Not Found
The requested URL /categories/ was not found on this server.

I just found some answers for that but none of those worked me.Any help?

Have you checked DNS related settings? Ping? Tracert?

Is it a WP site?
If yes - go to the page that is not working and edit the permalink.
It is possible that the page is redirecting to the wrong address.
If not make sure that the folders are in the correct hierarchy.

Here is an easy to follow tutorial for reseting the permalinks.
https://themanifest.com/web-design/blog/how-to-fix-broken-permalinks-wordpress#:~:text=You%20can%20fix%20broken%20permalinks,issues%20on%20a%20WordPress%20site.Good luck!