Problem with pages widget

Hello,

I’ve just set up wordpress on my own server; here’s the link to my first post:

https://www.kuvik.net/ztoft/playingbythebook/

As you’ll see I’ve used the pages widget to put a link to my “about” page on the right hand side of the screen. All very well, but when I click on the link I get

Not Found

The requested URL /ztoft/playingbythebook/about/ was not found on this server.

What I don’t understand is why the page I’ve created isn’t being found. In fact none of the pages (as opposed to posts) I’ve created seem to appear on my server even though they are all showing as published. Can anyone suggest what the problem is here and how I can solve it?

Many thanks in anticipation,

Zoe