Appears this was an issue for many folks about a year ago. Not seeing anything recent in the community.

I purchased Sonos Radio from the Sonos website, not from the Sonos app on my phone. I have both S1 and S2 and my house. The S1 app seems unaffected, as I believe it doesn’t support the HD subscription service.

However, the S2 is stuck asking me to reauthorize. When I select this, it comes back with an error. I continue to try after letting some time pass (the website suggest it may take a few minutes for my purchase to process), however, it’s been a while now and still it’s stuck in a loop.