Required Authorization for CD songs Uploaded to Apple Music/iTunes.

I am trying to play original music that I uploaded to my Apple Music, formerly iTunes, some years ago. It plays without interruption on my phone, but will not play from my MacBook. When I try to play it, I receive an error message that says that I am not authorized to play that music from this device.

How?

I own the music, in as much as I wrote it, I own the recording, and I own the MacBook. I'm confused as to why this is happening. All of the advice that I've seen pertains to songs purchased from iTunes that for some reason aren't authorized on an updated/replacement device.

Please help!