located East Coast US….I have a mix of old Sonos products (15+ years old, still going strong) [can only use S1 app which I prefer] and a few newer Sonos products for TV surround sound [Beam, Arc, Sub, requires using new S2 app but refuse to since still hopeless waste of an app]. 

Similar to other folks here, end of Aug/ early Sept-2025 experienced the dreaded “Song not encoded correctly” issue only when playing music from SoundCloud [which is 99.9% time], all other services work [Amazon Music, Spotify, Pandora, etc.].  Tried all the rebooting, remove / reauthorize SoundClound but no help.  Later in Sep-2025, SC started working again.  But alas fleeting, now have the same error message again [end of Oct-2025].  Assume from recent posts, folks are now experiencing same issue again.  Will try to reach out to Sonos FWIW… [just venting, wish I had a viable solution to offer folks]   

I suspect, as the other Sonos options are all working, it is an issue with SoundCloud. Have you contacted them?

I’d be interested in what Sonos Support says, as well. 

Same issue here in Australia. I see this has been going on for a month so far. Any news on a fix? 
 

Andy

Thank you guys! Reauthorizing my SoundCloud account fixed it

I raised a ticket with Soundcloud but have heard nothing.

Sonos support were next to useless insisting I restart, reauthorise, reboot my router which made no difference.  They then wanted to me to call them so I could go through “more in depth” troubleshooting. Sod that. I explained the problem and reminded them it also happened a month ago and was resolved outside of anything I did.

Useless support. First wade through AI prompts to get to chat with someone who then went through a script of do this, do that which got nowhere slowly.