Hi,
I went to Preferences > SEO & URLs and edited the (friendly) URLs, but when I visit them I get a 404. This happens both with friendly URLs activated and deactivated.
So, for example, https://www.shop.com/index.php?controller=prices-drop (the original URL) works, but https://www.shop.com/index.php?controller=specials does not work.
However, the original (ie I didn't add it) URL https://www.shop.com/index.php?controller=suppliers also doesn't work.