Codex App returns 401 Missing bearer/basic authentication after login on multiple Windows laptops

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

Version 26.623.101652

What subscription do you have?

ChatGPT Pro

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

Codex App appears to be signed in, but requests fail with a 401 authentication error.

ChatGPT web works normally on the same account, but Codex App fails when I send a prompt.

Full error message:

unexpected status 401 Unauthorized: Missing bearer or basic authentication in header
url: https://api.openai.com/v1/responses
cf-ray: a16f046b1ea10740-TPE
request id: 8d9b3ff3-f271-4fc1-a897-696168e441b

### What steps can reproduce the bug?

Feedback ID: 019f37b6-da1f-7bd2-9e59-9cb0a1099c7a

### What is the expected behavior?


```markdown
After signing in successfully, Codex App should attach the correct authentication credentials to requests.

For a clean folder and a minimal prompt such as:

```text
Reply only: test

### Additional information

```markdown
Additional notes:

- ChatGPT web works normally on the same account.
- The issue occurs across multiple Windows laptops, so it does not appear isolated to one local installation.
- I tried logging out and signing back in.
- I submitted in-app feedback.

Feedback ID:

```text
019f37b6-da1f-7bd2-9e59-9cb0a1099c7a