I cannot get the "World Clocks" widget to do anything. Nothing loads nor do the clocks display? What do I need to do other than click, or double click on the icon to make them load and display on the computer

I have tried virtually everything that I could think of to do, including unloading and reloading, disabling and reloading, etc. but nothing works. When I either click, or double click (wasn't sure which one to do so I tried to do both, but the clock will never appear, nor do they appear to load. This looks like a useful widget, but only if I can get it to work