Bug type

Regression (worked before, now fails)

Summary

googlechat was working, updated from 2026.2.26 to 2026.3.3, no longer working.

Running openclaw doctor shows:
Google Chat: failed (unknown) - Cannot convert undefined or null to object

the webhook returns 401 to the caller now.

My googlechat config is attached.

googlechat.json

Steps to reproduce

1. config as attached
2. run openclaw doctor
   observe the error, observe probe fails

openclaw channels status --probe
Gateway reachable.

• Google Chat default: enabled, configured, running, dm:allowlist, probe failed

Expected behavior

googlechat is returning 401, should be 200 OK

Actual behavior

googlechat is returning 401, should be 200 OK

OpenClaw version

2026.3.3

Operating system

Ubuntu 24.04

Install method

npm local

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response