Itunes purchases say my computer isn't authorized to play

Repeated requests to authorize an already authorized computer for recent store downloads typically indicates you have corrupt or incomplete copies. 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 prompts you to authorize your computer when you try to play iTunes Store purchases - Apple Support.

tt2

Can't you see all the people who are being asked to authorize their computer for songs they just purchased or have had for years?

I am now getting "authorization" requests for every other song I buy. All these songs cannot be corrupted.

Plus I am getting "authorization" requests for songs that I have had for years.

It looks like a problem with iTunes.