AP News no longer provides RSS feeds. This plugin provides virtual AP News feeds based upon JSON used by their website.
Verify you're using Tiny Tiny RSS code from 2017-10-01 or later (specifically: 0f0d6ca559
)
Clone the repo to an apnews subdirectory in your plugins.local directory:
git clone https://github.com/supahgreg/ttrss-apnews.git apnews
Enable the plugin @ Preferences / Plugins