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claude-code - 💡(How to fix) Fix [BUG] Buggy login behaviour [1 comments, 2 participants]

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anthropics/claude-code#45362•Fetched 2026-04-09 08:07:11
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Author
wojtekszkutnikwojtekszkutnik
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github-actions[bot]github-actions[bot]wojtekszkutnikwojtekszkutnik
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Error Message

Error Messages/Logs

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Preflight Checklist

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

What's Wrong?

The login behaviour has multiple bugs preventing reauthenthication:

  • In the last couple days, for whatever reason I get asked to reauthenthicate at least once a day
  • The auth link is buggy in iTerm2 - both when I try to copy it manually and when I use the c to copy hotkey that is powered directly by Anthropic - it copies the link with newlines/tabs that break the link:

Authorization failed

Redirect URI https://platform.claude.com/oauth/cod e/callback is not supported by client.

  • When I edit the url manually to remove the whitespace and get past this, sometimes Claude Code randomly rejects the token and I have to do the flow one more time for it to work

The whitespace part was always broken but the browser window not opening, need to reauthenthicate and random failures are a new thing

What Should Happen?

  • An authenthication window should open
  • c to copy should copy the link without whitespace
  • The rendering of the link shouldn't include whitespace

Error Messages/Logs

Steps to Reproduce

  1. get randomly logged out
  2. try to copy the login link

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

2.1.96 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

No response

extent analysis

TL;DR

The login behavior issues, including frequent reauthentication requests and buggy auth links, may be resolved by investigating and fixing the whitespace issue in the auth link and potential token validation problems.

Guidance

  • Investigate the source of the whitespace in the auth link to prevent it from being copied with newlines or tabs, potentially by modifying the link generation or copy functionality.
  • Verify that the auth link is correctly formatted and rendered without whitespace to ensure successful authentication.
  • Check the token validation logic to identify why Claude Code sometimes rejects the token, requiring an additional authentication flow.
  • Consider testing the authentication flow in a different terminal or environment to isolate if the issue is specific to iTerm2 or a more general problem.

Example

No specific code snippet can be provided without more details on the authentication link generation and token validation logic.

Notes

The issue seems to be a regression, as it worked in a previous version, and the exact cause is unclear without more information on the changes made between versions.

Recommendation

Apply a workaround by manually editing the auth link to remove whitespace until a permanent fix can be implemented, as the root cause of the issue is not fully understood.

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#api#latency issue#model loading#dependency error#configuration error

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