[BUG] Cowork left sidebar completely missing — no Settings, navigation, or Feedback buttons visible

[automationchaya-eng]

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 entire left sidebar in Cowork is missing/collapsed and cannot be reopened. This sidebar contains critical UI elements including Settings, navigation between modes (Chat/Code/Cowork), and the Feedback button — none of which are accessible.
The X button at the top left appears to be stuck together with the collapsed sidebar and is also non-functional.
As a result, it is impossible to:

Access Settings
Navigate between app modes
Use the Feedback button to report the issue from within the app

Restarting the application does not resolve the issue.

What Should Happen?

The left sidebar should be fully visible and functional, displaying all navigation options including Settings, mode switching (Chat / Code / Cowork), and the Feedback button. The X button should work independently and not be tied to the sidebar state.

Error Messages/Logs

Steps to Reproduce

Steps to Reproduce:

Open Claude Desktop app
Navigate to Cowork mode
Observe that the left sidebar is collapsed and cannot be expanded
Attempt to click the X button — it is unresponsive
No Settings, navigation, or Feedback button are accessible

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

cant find, part of the problem

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

No response

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Chat panel squeezed between left sidebar and right panel after recent update — text cut off on both sides #50035
2. [BUG] Left sidebar clips chat content on hover in macOS Desktop app #49769
3. [BUG] When resizing the left sidebar (conversations list) to a narrow width, a stats overlay panel appears and blocks the main work area" #48346

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

[automationchaya-eng]

my problem is with windows

[github-actions]

Closing for now — inactive for too long. Please open a new issue if this is still relevant.

[baldman1972]

Fixed without reinstalling. After the update, the Code and Cowork tab stopped working. The issue was authorization — re-authenticating via terminal solved it for both the terminal and the desktop app. Just run claude in the terminal and log in when prompted. After that, all three tabs (Chat, Cowork, Code) work correctly in the desktop app as well.