Hello jroyle,
If we understand correctly, you're having trouble syncing music from iTunes over to your iPhone.
Is this happening with the same songs or albums or is this happening with any song or album you choose?
Is iTunes and iOS fully updated? Have you tried restarting both the computer and iPhone one after the other to see if that helps?
Are you running any third-party security software? If so, can you try changing the security settings temporarily? Some third-party software, including security software, can interfere with the sync process between your computer and your device. Take a look at the a few steps listed below. This includes the steps under "If you still see the error." The article states these errors are for Macs, but the steps listed can apply to iTunes on a PC as well.
If you see error -5000, -69, 13010, or 13014 when you sync music from your Mac
If your computer doesn't recognize your iPhone, iPad, or iPod
Warm regards.