E1401. Backend unreachable

Severity: ERROR. The SDK degrades to the cached bundle when one exists.

What happened

The SDK could not connect to api.controlzero.ai (or whatever CONTROLZERO_API_URL points at). Tool calls will use the cached policy bundle; new audit events buffer locally.

How to fix

Check curl -I https://api.controlzero.ai. If you're behind a corporate proxy, set HTTPS_PROXY before launching your agent.

See also

• E1205 -- Policy bundle missing, fail-closed engaged
• E1402 -- Backend returned 5xx
• E1404 -- TLS verification failed
• Errors index