Unfortunately, our contract with the AP has expired and AP content is no longer available in the app. We weren't able to get an update prepared in time to remove the categories, but a message was supposed to be sent notifying customers these stories were no longer available. We apologize if you did not receive it.
While the AP categories are no longer available, there's still plenty of great content from Time, Entertainment Weekly, People, The Huffington Post, and more. Tap the menu in the upper left and select a non-AP category and the app still return new stories.
Menu --> Discover More Content --> Time for example.