[BUG] Authentication Error: Invalid bearer token persists after login

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?

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report
• [x] I am using the latest version of Claude Code

What's Wrong?

I'm experiencing a persistent authentication error when trying to use Claude Code. The error occurs even after attempting to log in again.

Error Message:

API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer token"},"request_id":"req_011CUZZAc8AFoCvShVWRHngg"}
Please run /login

Steps to Reproduce

1. Launch Claude Code
2. Attempt to execute any command
3. Receive 401 authentication error
4. Run claude logout followed by claude login
5. Error persists after re-authentication

Expected Behavior

Commands should execute successfully after logging in with valid credentials.

Actual Behavior

The authentication error continues to occur even after:

• Logging out and logging back in
• Reinstalling Claude Code
• Completely uninstalling and reinstalling the application

The bearer token appears to be invalid or not being refreshed/stored properly.

Environment

• Claude Code Version: 2.0.28 (latest)
• OS:macOS

Additional Context

I have tried the following troubleshooting steps without success:

• Complete uninstall and reinstall of Claude Code
• Logging out and logging back in multiple times
• Checking for version updates (already on latest 2.0.28)

The issue suggests a problem with token storage, refresh, or validation on the client side.

What Should Happen?

claude code should login

Error Messages/Logs

API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer
     token"},"request_id":"req_...."} · Please run /login

Steps to Reproduce

1) claude
./login -> error

2) restart , npm uninstall/install or /logout ..rm -rf claude/claude.json or downgrade verions
3) unset ANTHROPIC_BASE_URL ANTHROPIC_BASE_URL ANTHROPIC_AUTH_TOKEN

-> not give solution -> always this error

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.28

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_