I assume that the "Cakes" menu item is of type "Menu Heading" (I don't use Florence, but in the Skylar demo, it's just the same). If you want to open an article with that menu item, you will have to change the type to "Single Article".

Nope, the menu item type is "Dj-Catalog2 List of items (table or blog/grid)". Just for testing I have also tried making it link to single article, but it is still not clickable. It must be a javascript error or some other template issue.

What's weird is that if you hover over the link, the browser shows the linked URL:
https://hosting.isurfedthere.com/~edelweiss/index.php/cakes

And this shows in the inspector:
<a href="/~edelweiss/http://index.php/cakes">Cakes</a>

But once you've clicked it and expanded the items below it, hovering over it again shows no link, and just this shows in the inspector:
<a>Cakes</a>

Try it yourself and see if you see the same thing I do.

I assume that the "Cakes" menu item is of type "Menu Heading" (I don't use Florence, but in the Skylar demo, it's just the same). If you want to open an article with that menu item, you will have to change the type to "Single Article".