Connection with Spotify is lost. I get this message track after track - nothing will play. Spotify plays OK with their desktop app and plays no problem on my other devices. I use Qobuz on Sonos too and am having (today) no problems at all. I have tried the usual - re-adding Spotify, rebooting router, rebooting laptop etc etc etc. I have tried to submit diagnostics but the process just hangs saying 'submitting' and after 10 minutes says 'try again'. Broadband speed is 4.25Mbps - wireless network is behaving faultlessly and Sonos controller is hardwired. Ideas?