Website

What version of the Codex App are you using (From “About Codex” dialog)?

26.616.41845

What subscription do you have?

Plus

What platform is your computer?

Windows 10

What issue are you seeing?

Codex Browser / Computer Use regression on Windows
Environment
Codex desktop package: OpenAI.Codex_26.616.5445.0_x64
Codex CLI: 0.142.0-alpha.6
Browser plugin: 26.616.41845
Computer Use plugin: 26.616.41845
Windows: Windows 10 Pro, build 10.0.19045, x64
Node runtime reported by Codex: v24.14.0
Failure
Every call to the node_repl/js MCP tool fails immediately, before user code runs:
Mcp error: -32602: js: codex/sandbox-state-meta: missing field sandboxPolicy
The same failure affects both Browser and Computer Use because both depend on node_repl/js.
Reproduction
Open the Codex in-app browser.
Start or resume any local thread.
Ask Codex to inspect or click the current page.
Browser bootstrap calls node_repl/js.
The call fails in approximately 1 ms with the error above.
The issue reproduces across multiple new threads and after application restart and reinstall.
Evidence
Desktop logs show the in-app browser backend and native pipe reaching startup_ready successfully.
The target webpage loads successfully inside the browser sidebar.
The failure occurs before the browser bootstrap JavaScript executes.
Browser and Computer Use plugin files match the bundled marketplace files byte-for-byte.
Both Browser and Computer Use fail with the identical missing sandboxPolicy validation error.
The feature worked before the current desktop update.
Attempted recovery
Restarted and reinstalled Codex.
Created multiple independent threads.
Reopened the in-app browser.
Restarted node_repl.exe helper processes.
Tested the runtime's --disable-sandbox option; the desktop app regenerated its MCP configuration and the workaround did not persist.
Restored the standard safe configuration (args = []).
Expected result
Codex should pass a complete codex/sandbox-state-meta object, including sandboxPolicy, when invoking node_repl/js.

What steps can reproduce the bug?

whenever codex is supposed to use website, it fails

What is the expected behavior?

_No response_

Additional information

_No response_