[BUG] UNABLE_TO_GET_ISSUER_CERT_LOCALLY

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When attempting to launch Claude Code using the claude command, it exits with an error.

<img width="1479" height="289" alt="Image" src="https://github.com/user-attachments/assets/ab7efffa-4158-4758-9f93-50b1f6174764" />

What Should Happen?

I use Claude Code CLI.

Error Messages/Logs

Unable to connect to Anthropic services

Failed to connect to api.anthropic.com: UNABLE_TO_GET_ISSUER_CERT_LOCALLY

Please check your internet connection and network settings.

Note: Claude Code might not be available in your country. Check supported countries at https://anthropic.com/supported-countries

Steps to Reproduce

While using Claude Code in DevContainers, I suddenly encountered an "API Error (Connection error.) TypeError (fetch failed)" and stopped receiving responses.

I attempted to execute "/logout" and re-authenticate, but received a "Failed to connect to api.anthropic.com: UNABLE_TO_GET_ISSUER_CERT_LOCALLY" error, rendering it unusable.

I tried both WSL2 and Windows environments, but encountered the same issues.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.0.126 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_