Whenever I try to add a clock to the World Clock widget in the Today area of Notification Center, it never gets added. Sometimes I can’t even search for the city I want to add. However, whenever I am able to search for a city, it finds it, and when I press enter or click on the name, it behaves as it should be, but the clock never gets displayed.

[![enter image description here](https://i.stack.imgur.com/uRZl8.png)](https://i.stack.imgur.com/uRZl8.png)

And yet it remains like this:

[![enter image description here](https://i.stack.imgur.com/Ws0Oh.png)](https://i.stack.imgur.com/Ws0Oh.png)

What I tried so far:

* restart Finder;
* restart computer;
* delete the widget and add it back.