cant play some songs

Repeated requests to authorize an already authorized computer for store downloads typically indicates you have corrupt or incomplete copies. Backup and then delete the tracks that won't play from your library without hiding from your purchase history. Redownload using the cloud links that should remain, or close iTunes and reopen if they don't show up straight away. While downloading click the activity widget and turn off the option that allows for simultaneous downloads.

If that hasn't helped see If iTunes for Windows prompts you to authorize your computer when you try to play purchases - Apple Support.

tt2

Hello ~Try this…Go to preferences and make sure Apple Music and iCloud music library are checked. Also take a look here:

If your songs are grayed out - Apple Support

~Katana-San~

Hello again ~ Tell me exactly what is happening as you try…as many details as possible so we can help you further. Reply back to me not yourself so others can help as well:)

~Katana-San~