I have an Onkyo TX-NR7100. I can log into the Deezer app and browse my content. However, trying to play anything results to a "Playback error" on the amp. I have tried logging out and logging back in, with no success. I have tried pulling it out from the mains, waiting for a minute, then plugging it back in. Still no go. All other functionality with the amp works. Spotify, Chromecast, etc works. Deezer was working until around early June. I don't want to do a factory reset on the receiver as it's quite a bit of work to calibrate the speakers.
On my phone, the Deezer app works fine with no issues. So, at least I know it's not my Deezer account.