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windows sandbox failed: helper_unknown_error #36265

Description

@askena-debug

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

Version 26.721.81911

What subscription do you have?

Pro

What platform is your computer?

Windows 11

What issue are you seeing?

Codex fails before attaching to both the in-app browser and Chrome controller with windows sandbox failed: helper_unknown_error: setup refresh had errors. Full CDP access is enabled, Chrome is signed in, and the failure occurs before any page inspection.

What steps can reproduce the bug?

Feedback ID: 019fb450-7681-7433-8293-95346f16d2b6

What is the expected behavior?

Connect to Beehiiv and continue the production of newsletters

Additional information

I am really frustrated and plan to move to Claude Cowork/Code

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    appIssues related to the Codex desktop appbrowserbugSomething isn't workingsandboxIssues related to permissions or sandboxingwindows-osIssues related to Codex on Windows systems

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