[BUG] 403 on Claude Desktop Cowork (Win64)

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?

I have this mode available, but all requests lead to 403

!Image

account: zaretskaya.sofiya@gmail.com

What Should Happen?

We should have access to Cowork mode in Pro plan.

Error Messages/Logs

Steps to Reproduce

Create a project in CoWork and do a request in it.

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

1.1.8629.0

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_