Windows Chrome plugin connection fails: windows sandbox failed: spawn setup refresh

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

26.519.11010.0

What subscription do you have?

ChatGPT Pro

What platform is your computer?

_No response_

What issue are you seeing?

Codex desktop app on Windows: Chrome plugin connection fails.

Error:
windows sandbox failed: spawn setup refresh

What I checked:

• Codex Chrome Extension is installed and enabled in Chrome Default profile.
• Native messaging host manifest exists:

C:\Users\ryoui\AppData\Local\OpenAI\extension\com.openai.codexextension.json

• HKCU registry key exists:

HKCU\Software\Google\Chrome\NativeMessagingHosts\com.openai.codexextension

• Opening Chrome Default profile via plugin script succeeds.
• Browser connection still fails before listing tabs.

What steps can reproduce the bug?

Codex desktop app on Windows: Chrome plugin connection fails.

Error:
windows sandbox failed: spawn setup refresh

What I checked:

• Codex Chrome Extension is installed and enabled in Chrome Default profile.
• Native messaging host manifest exists:

C:\Users\ryoui\AppData\Local\OpenAI\extension\com.openai.codexextension.json

• HKCU registry key exists:

HKCU\Software\Google\Chrome\NativeMessagingHosts\com.openai.codexextension

• Opening Chrome Default profile via plugin script succeeds.
• Browser connection still fails before listing tabs.

What is the expected behavior?

_No response_

Additional information

_No response_