[BUG] Unable to access Claude Code after successful OAuth login with Google account

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?

After completing the OAuth login flow via browser using my Google-authenticated Claude account, I receive the error:

Unable to access Claude Code There was an issue accessing Claude Code. Try signing out and back in, or contact support if the problem persists.

Environment:

Operating System: Linux (Ubuntu 24.04, some colleagues on MacOS have the same issue)
Claude Code version: 2.1.12 (Claude Code)
Account type: Claude Team
Authentication method: Google OAuth

What Should Happen?

Should successfully authenticate and allow me to use Claude Code with my subscription.
Actual behavior:
Authentication appears to succeed in browser but fails in CLI with the error above.

Error Messages/Logs

Unable to access Claude Code
There was an issue accessing Claude Code. Try signing out and back in, or contact support if the problem persists.

Steps to Reproduce

Run claude in terminal
Select login with Claude app (subscription account)
Browser opens and authentication completes successfully
Browser shows success message
Return to terminal - error message appears instead of successful login

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.12

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

<img width="968" height="447" alt="Image" src="https://github.com/user-attachments/assets/4773a4b6-b2fb-4a0d-8c5a-9fac2f13b1a9" />
<img width="273" height="400" alt="Image" src="https://github.com/user-attachments/assets/a9ca3f48-f7a0-4821-827a-903bb8bf514c" />

<img width="958" height="338" alt="Image" src="https://github.com/user-attachments/assets/4a2b51cd-9ba5-4bbb-8e87-fb101eef3956" />