---
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"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/30135#article
headline: "30135: Unable to issue certificate"
url: https://www.twilio.com/docs/api/errors/30135
inLanguage: en
dateModified: 2026-04-20T06:45:15.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 30135: Unable to issue certificate

Log Type: TWILIO

Log Level: ERROR

## Description

### Possible causes

Domain DNS setup is not completed. There is an issue with the certificate authority

### Possible solutions

Verify your Domain DNS setup. If you continue seeing this error, contact the Support team.