[BUG] fail to create custom style in a team plan

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?

<img width="754" height="198" alt="Image" src="https://github.com/user-attachments/assets/f0872846-dbda-4aa7-b978-6c5ff7411627" />

when I try to add a custom style, it shows error handling style, please try again

What Should Happen?

Claude should create a custom style

Error Messages/Logs

Steps to Reproduce

1. create and edit styles
2. create custom style
3. add writing example

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.141

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_