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claude-code - 💡(How to fix) Fix [BUG] Server is busy Claude cowork desktop error [2 comments, 2 participants]

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anthropics/claude-code#52765•Fetched 2026-04-25 06:21:34
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2
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Author
Hurricane153Hurricane153
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github-actions[bot]github-actions[bot]Hurricane153Hurricane153
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Error Message

Failed to authenticate. API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer token"},"request_id":"req_011CaNG1Fxm2bmkq6rrdYosa"}

Code Example

Failed to authenticate. API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer token"},"request_id":"req_011CaNG1Fxm2bmkq6rrdYosa"}
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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?

When i try to use claude cowork I consistently get message server is busy, then after 10 attempts i get this error message: Failed to authenticate. API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer token"},"request_id":"req_011CaNG1Fxm2bmkq6rrdYosa"}

What Should Happen?

Claude cowork should run normally.

Error Messages/Logs

Failed to authenticate. API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer token"},"request_id":"req_011CaNG1Fxm2bmkq6rrdYosa"}

Steps to Reproduce

  1. Open claude desktop app
  2. Run claude cowork

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

claude cowork

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

No response

extent analysis

TL;DR

The most likely fix is to re-authenticate or refresh the bearer token used by the Claude Code application.

Guidance

  • Verify that the authentication credentials and bearer token are correctly configured and not expired.
  • Check the Anthropic API documentation for any specific requirements or restrictions on authentication tokens.
  • Attempt to re-authenticate or refresh the bearer token before running the claude cowork command.
  • If the issue persists, try resetting the application's authentication settings or seeking assistance from the Anthropic API support team.

Example

No code snippet is provided as the issue does not contain sufficient technical details.

Notes

The exact cause of the authentication error is unclear, and further investigation may be required to determine the root cause.

Recommendation

Apply workaround: Re-authenticate or refresh the bearer token, as the issue is likely related to an invalid or expired authentication token.

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