Hey there, @Pmc. 👋
I moved your post over to this existing thread: Sonos - Error Message: Someone Else Listening
To ensure this isn't due to an unauthorized user accessing your account, I've gone ahead and removed all the devices associated with your Pandora account. This will automatically sign you out everywhere including any devices you currently have, so you will need to sign back in once this change takes effect. Please be patient as this may not happen instantaneously.
If this does not resolve the issue, please check out the accepted solution to this thread for more information.
Hope this helps. Feel free to let us know how it goes. 🎧
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