Error 404 - page not found


I’ve put the products on products tab. I’ve been doing the same thing over and over… Everything was just fine until i had an error “Error 404 - page not found …Ohh… You have requested the page that is no longer there.” … But the page is there. I only get this error on specific pages.

I’ve already tried deleting it and adding a new one but then I still get the same error. Does anyone experiencing the same? What could be the solution to this? Thank you.