Any Fix for Syncing Audible Audiobooks on iTunes (Windows 11 PC) with iPod Nano 7th Gen?

My Audible is authorized in iTunes in my Windows PC Windows 11, but I am not able to sync Audible audiobooks with my iPod Nano 7th Gen. Using this iPod is still more convenient than using an Android or IOS mobile phone to listen. I was able to easily sync before Apple changed iTunes to Apple TV, Apple Music, and Apple Books. These days, July 2024, I keep getting this error: "Some Audible files were not copied to the iPod "MyName's iPod" because you are not authorized to play them on this computer." While I am actually authorized to play the Audible audiobooks on my computer using iTunes, I keep getting this issue. Does anyone have a solution? The Audible app on my computer is not loading/updating my library and I have not found a solution. Thanks!