I started my Kindle Unlimited trial yesterday for the sole purpose of being able to listen to books that have audio attached. It worked fine yesterday but today all of my books, even ones I have for years, are "invalid items" and Kindle tells me to remove them.
Here's what I've tried: Delivered through my "manage" page on the Amazon website, Cleared cache, removed data, removed updates, uninstalled and re installed, and rebooted my phone. I have a Galaxy 4 and there's the Kindle Samsung app on the phone but it doesn't offer audio so I chose to use the regular Kindle app for Android. I even uninstalled the Kindle Samsung app and tried all of the ideas listed above again.
Any other suggestions?
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