I’m running Home Assistant OS 5.11 on an RPi 3, and I get this error whenever I try to upgrade:
21-02-28 21:08:56 INFO (MainThread) [supervisor.hassos] Fetch OTA update from https://github.com/home-assistant/operating-system/releases/download/5.12/hassos_rpi3-64-5.12.raucb
21-02-28 21:08:58 WARNING (MainThread) [supervisor.hassos] Can't fetch versions from https://github.com/home-assistant/operating-system/releases/download/5.12/hassos_rpi3-64-5.12.raucb: Response payload is not completed