Soundcloud problem - Unable to play - Song not encoded correctly

Would this be the issue?

Perhaps you are onto something, newly added tracks to que seems to be working . Thanks!

(I tried tracks already in the current list. (which is saved in a sonos component) )

Songs from feed, search results and liked all not playing. 

What did Sonos Support say, when you called in to discuss it? Did you speak to the ‘bot, or a human?

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

From another thread that I am unable to find now, the solution is to delete tracks fro your playlist and re add them. This is because SoundCloud did some work on the back end on Match 11th. 

Found the thread 

your saved SoundCloud tracks are suddenly refusing to play, you aren’t alone! Here is a quick heads-up on what’s going on and how to easily fix it.

The Issue
SoundCloud rolled out some backend system updates on Wednesday, March 11th. Because of these changes, any SoundCloud tracks you saved to your Sonos Playlists or Sonos Favorites before that update are now pointing to broken, outdated links.

If you are running into this, you’ll likely see generic error messages in the Sonos app, such as:

• “Could not play [name of song]. Try again.”
• “Failed to play content. Try again.”

The Fix
The good news is that your music isn’t gone; you just need to refresh the links. Here is the workaround:

• Delete the affected track(s) or playlist from your Sonos Favorites or Sonos Playlist.
• Search for the content again in the Sonos app.
• Re-add it to your favorites or playlist.

It is a bit of a manual process to recreate them, but doing this will update the links and get your music streaming smoothly again

Thanks- this worked.

I’m seeing the same issue and wanted to add another data point.

Both of my systems are affected:

• Home system: Sonos S2 (fully updated)
• Office system: Sonos S1

In both locations SoundCloud playback fails with errors like “song not encoded correctly” or “failed to play content.”

Things I tested:

• Playing tracks saved in Sonos favorites → fails
• Searching for a brand new track in SoundCloud from the Sonos app → also fails
• Removing and re-searching tracks does not fix it
• Both systems are on different networks and locations

Because the issue is happening on both S1 and S2 and even with newly searched tracks, it does not appear to be the old playlist link issue mentioned earlier in the thread.

SoundCloud tracks play normally in the SoundCloud app itself.

This looks more like a Sonos ↔ SoundCloud integration or stream encoding issue rather than outdated saved links.

Adding this report in case it helps Sonos confirm the scope of the problem.

Interesting. Seems like a separate issue that your system is experiencing. What did Sonos Support say, when you called in with this issue?

As of today March 20 I'm experiencing this problem again 

I tried restarting, clearing queue and updating.