Hi everyone,
I’ve been working with Sonos Level 2 Support on this issue (case **********), but I wanted to check if anyone here has found a working solution for this situation.
Device details
-
Model: Sonos Connect:Amp (C100) – second-hand unit
-
Serial number: ***************
-
Software version: 78.1-52020 (S2 16.1.1)
-
Hardware version: 1.17.3.1-2.1
-
Accessible locally on port 1400
-
Internal pages responding:
/status/zpand/support/review -
Shows:
StubReason: secreg QuarantineReason: – -
Added to my Sonos system, but playback is blocked until the update and secure registration complete.
What I’ve tried so far
-
Multiple update attempts through different isolated networks:
-
iPhone hotspot → Mac internet sharing → TP-Link C1200 router → Connect:Amp via Ethernet
-
Also tested on ZTE Wifi Silbo, Linksys mesh + Starlink (bypass mode)
-
-
The update starts normally but fails at the end with Error 27 (also Error 1013 on macOS).
-
The Connect:Amp clearly has internet access (download starts), but it seems to reject or fail to validate the firmware package — likely due to expired TLS certificates or an outdated trust store.
Support feedback
Sonos L2 confirmed the device is stuck in a “secure registration” state (StubReason = secreg) and that the re-registration can only succeed after a successful firmware update — which, unfortunately, always fails.
My question to the community
Has anyone encountered this “secreg” + Error 27 loop and found a way to:
-
either manually update or flash a C100 Connect:Amp (S2) beyond version 78.1-52020, or
-
trigger a secure registration refresh when the update can’t complete?
Any technical insights, known workarounds, or hints on whether Engineering can push a forced firmware update to unlock the device would be greatly appreciated.
Thanks in advance,
Lars
Moderator Note: Removed case and serial number. Modified in accordance with the Community Code of Conduct.
