claude-code - 💡(How to fix) Fix [BUG] Cowork stuck on “Starting session” for days, and “Working through a complex response…” for 42+ minutes (macOS) [1 comments, 2 participants]

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anthropics/claude-code#45531Fetched 2026-04-09 08:03:14
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Error Message

Error Messages/Logs

No error., just doesnt work

Code Example

No error., just doesnt work
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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?

Body: Desktop app version: Claude 1.1348.0 (efa3fd) 2026-04-08T15:06:08.000Z macOS version: 15.5 (24F74) Behavior: Cowork has been stuck on “Starting session” for days, and I also had a task stuck on “Working through a complex response…” for 42+ minutes (even with simple prompts). Logs: (paste relevant Console.app lines around the time it gets stuck)

What Should Happen?

It should work

Error Messages/Logs

No error., just doesnt work

Steps to Reproduce

Prompt cowork and wait forever

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

Claude 1.1348.0 (efa3fd) 2026-04-08T15:06:08.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

  • The issue may be resolved by downgrading to a previous version of Claude Code, as the problem is reported to be a regression.

Guidance

  • Verify that the issue is indeed a regression by checking the release notes of previous versions to see if any changes could have caused the problem.
  • Try to reproduce the issue with a simple prompt to see if the problem is specific to certain types of inputs.
  • Check the Anthropic API documentation to see if there are any known issues or changes that could be causing the problem.
  • Consider reaching out to the developers or support team for further assistance, as the issue may be specific to the Anthropic API or Claude Code implementation.

Example

  • No code snippet is provided as the issue does not contain any specific code-related information.

Notes

  • The lack of error messages or logs makes it difficult to pinpoint the exact cause of the issue.
  • The fact that the issue is reported as a regression suggests that a previous version of Claude Code may have worked correctly.

Recommendation

  • Apply workaround: Downgrade to a previous version of Claude Code, as it is reported to have worked in the past. This may provide a temporary solution until the issue is resolved in a future version.

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