Location pages/posts do not show

I have set up the default custom post type of locations and entered a few cities as locations. There is a locations archive. However, when I click on one of the cities in that archive via https://d.xmarksthespot.co.uk/location I get a 404 page not found error.

Do I somehow have to set up a post for a location and link it to the custom post type of locations? If so, how do I do this please? Or have I overlooked something obvious?

Apologies, I’m not a techie.

p.s. Thinking it might be related I edited the plugin code via the following instructions but it made no difference:
https://www.ads-software.com/support/topic/post-type-will-not-save-publish-solved/

• This topic was modified 6 years, 4 months ago by xmarksthespot.
• This topic was modified 6 years, 4 months ago by xmarksthespot.

The page I need help with: [log in to see the link]