Do you just have the one Sonos ‘Room’ in your setup? - I appreciate you have a Sub and the One SL’s but are they all bonded together? If so, then maybe try this:

• Unbond the surrounds and Sub from the Arc and see if playing your playlists work to either the One SL speakers and/or the Arc - if not then, reset your Sonos App only and on re-opening the App choose to connect it to the ‘existing’ system and then try again.
• If the above doesn’t work try removing the Amazon Music Service from your Sonos App and adding it back to the App.
• If either of the options above works, then power off the Arc (but leave it off for a few minutes) - power it back on and then try bonding back the surrounds and Sub and then see if that now also works for you.

If all fails, I would suggest submitting a Sonos diagnostic report after it fails to play a number of your playlists and to contact Sonos Support via this LINK

Thanks so much for the response!

Yes, I have the arc, sub, and two One SLs bonded in one room. I also have a Move and the lists also do not work with it. Otherwise, my TV works fine and when I tried adding a new song, it worked normally.

I am not with my system right now, but will definitely try your suggestions later today. I will let you know how it went. Thanks once again!

The fact the playlists are also not working with the Move - I would first try powering off ALL your Sonos products again, including the Move, for a couple of minutes. Then remove the Amazon Music Service from the Sonos App and then add it back/reauthorise it again …and then if that doesn’t work, try resetting the Sonos App, before trying the other things mentioned. I suspect it’s just a software issue, but let’s see how it goes.
 

Thanks again for the second set of possible fixes. I tried them all with no luck. I called Sonos and sent the diagnostics. They told me that is a known issue after a power outage and that they will have it fixed soon. Unfortunately for me, my music files were corrupted and I have to add them back manually. I already mentally prepared myself, so that is what I’ll have to do.

I want to thank you again for taking the time to offer the technical help. If nothing else, it gave me a lot more experience with my system and I will know what to try if another situation arises.

All the best and stay safe!