[BUG] Cowork tab missing after auto-update on Windows 11 Pro**

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?

What's Wrong?
The Cowork tab has disappeared from the Claude Desktop app navigation after an auto-update. It was previously visible and accessible. Only the Chat tab is now shown. No error message is displayed.

Expected Behaviour
The Cowork tab should be present and accessible in the top navigation bar alongside Chat.

Steps to Reproduce

1. Launch Claude Desktop app v1.3883.0 on Windows 11 Pro
2. Observe that the Cowork tab is completely absent from the navigation
3. No error message is displayed — the tab is simply not there
4. Restarting the app does not resolve the issue

Environment

• App version: 1.3883.0 (93ff6c)
• OS: Windows 11 Pro
• Interface: Claude Desktop App
• Subscription: Pro

Additional Notes
Cowork was working previously and disappeared after an auto-update. Full app restart has been attempted — issue persists.

What Should Happen?

Claude should debug and restore Cowork functionality

Error Messages/Logs

Steps to Reproduce

What's Wrong?
The Cowork tab has disappeared from the Claude Desktop app navigation after an auto-update. It was previously visible and accessible. Only the Chat tab is now shown. No error message is displayed.

Expected Behaviour
The Cowork tab should be present and accessible in the top navigation bar alongside Chat.

Steps to Reproduce

1. Launch Claude Desktop app v1.3883.0 on Windows 11 Pro
2. Observe that the Cowork tab is completely absent from the navigation
3. No error message is displayed — the tab is simply not there
4. Restarting the app does not resolve the issue

Environment

• App version: 1.3883.0 (93ff6c)
• OS: Windows 11 Pro
• Interface: Claude Desktop App
• Subscription: Pro

Additional Notes
Cowork was working previously and disappeared after an auto-update. Full app restart has been attempted — issue persists.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

N/A

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_