Onkyo Audio Receiver Playbook

I am trying to play my music library through my Home theater system and surround sound speakers. It was working and then I signed up for Apple music. It has since been giving me an error message that the content is protected by DRM.

I purchased the music that I am trying to play. I thought that maybe since I am paying for a service through Apple Music that content is protected, so I started trying to only play music I bought. That is still not working.

I have cancelled my subscription to Apple Music. So it seems to me I should be able to play my music on any of my platforms. The Onkyo receiver has an app that allows you to play different apps, such as Pandora, Spotify, etc. AirPla is also an option, but I think that only works through Bluetooth and my system is hardwired.

Any suggestions?