codex - 💡(How to fix) Fix Windows sandbox: spawn setup refresh fails on Codex CLI 0.133.0

What version of Codex CLI is running?

codex-cli 0.133.0

Platform

Windows

Install method

npm global install:

npm install -g @openai/codex

Node / npm

Node: v24.12.0 npm: 11.6.2

What happened?

After updating Codex CLI to 0.133.0, shell commands started failing before execution with:

windows sandbox: spawn setup refresh

Even a simple pwd command failed before the shell started. This also reproduced outside the project directory in C:\tmp\codex-test, so it did not appear to be project-specific.

Repro steps

1. Install/update Codex CLI to 0.133.0 on Windows.
2. Start Codex.
3. Ask Codex to run a simple command like pwd.
4. Observe command execution fails before shell startup.

Expected behavior

Codex should execute simple shell commands normally.

Actual behavior

Tool execution fails before the shell starts:

execution error: Io(Custom { kind: Other, error: "windows sandbox: spawn setup refresh" })

What did not fix it

• Closing and reopening the terminal
• Restarting the computer
• Uninstalling and reinstalling Codex CLI 0.133.0
• Testing in a clean directory outside the repo

Workaround that fixed it

Downgrading to Codex CLI 0.132.0 fixed command execution:

npm install -g @openai/codex@0.132.0

Related issue

This looks related to prior Windows sandbox setup-refresh failures, for example: https://github.com/openai/codex/issues/21208