HomeBrandsTwilioCommunications API11237
T
11237
Moderate
Twilio · Communications API
Certificate chain path could not be validated.
Quick Answer
Error code 11237 on your Twilio Communications API means: Certificate chain path could not be validated.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
TWILIO-MSGTWILIO-VOICETWILIO-TRTWILIO-FLEXTWILIO-WEBHOOKSTWILIO-VERIFY
Likely Causes
  1. Network path, DNS resolution, or upstream gateway link is degraded.
  2. TLS, proxy, or firewall configuration interrupts request/response transport.
  3. Timeout budgets are lower than real-world latency for this dependency chain.
How to Fix It
1
Twilio: Test DNS and TCP reachability to the endpoint from the same runtime environment.
2
Inspect proxy, TLS, and firewall policy for blocked handshake or egress paths.
3
Increase connect/read timeouts and add bounded retries for transient failures.
4
Correlate client timestamps with provider status and upstream gateway metrics.
5
Re-run traffic after transport stability is restored and verify error rate drop.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Related Error Codes
400403404410503
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